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Weaver® W-937-40 Wheel Balancer

Weaver® Equipment

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Now with FREE Light Truck Cone Kit, $250.00 Value!  The Weaver® W-937-40 is our Commercial Grade, mid-volume computer wheel balancer.  Trusted the world over, the W-937-40 has become one of America's Best Selling Wheel Balancers since 2007.  Why have they become so Popular?  As our reviews confirm, Weaver® Wheel Balancers are Accurate on all wheel types, Reliable in demanding shops, have ALU programs for tape on weights on nice rims.  All Weaver® tire changers and balancers are manufactured by Nexion, the Italian company that invented the first wheel clamp tire changer in 1962.  But we don't stop there!  It is a 30+ year tradition that we take care of our customers after the sale with a huge parts inventory and Great Customer Service.

FREE SHIPPING! Includes Free Residential and Free Lift Gate Service!  

Which Weaver® Wheel Balancer is Right for you? (See chart below)

The W-937 and W-957 share the same software, the main difference being the space requirement. 


Note - Some offset and dually wheels will require our truck cone kit, which includes the back cone spacer cup and the large cone for center holes up to 6 7/8".  The W-937 and W-957 Wheel Balancers with 36 mm. shafts use the W-TKD 36mm Truck Cone Kit, and the W-937-40 / W-957-40 / W-977 with 40 mm. shafts use the W-TKD 40mm.

Derek Weaver Company announces the newest addition to our Commercial Grade, mid-volume wheel service line, the Weaver® W-937-40 Computer Wheel Balancer.  The Weaver® W-937-40 is a Full Featured design that will withstand the demands of a mid-volume commercial shop  at our lowest price ever.  Components used in the W-937-40 are state of the art designs typically reserved for more expensive wheel balancers.  Incorporated into the design is an easy to use data entry sequence, Static and Dynamic balancing along with multiple balance modes for a variety of weight placements.  The user calibration is a quick and easy two step process that utilizes fast software updating using a real test weight sequence.   

The Weaver® W-937-40 will handle rims up to 24" in diameter as well as wheel widths up to 20" and tire/wheel assemblies weighing up to 143-lbs.  Bigger truck tires are no problem with this machine.  Our New standard cone set (3 cones with an extra truck cone and truck spacer ring) has been Custom Tapered to accommodate a range from 1.625" - 6.125" center holes.  Now includes FREE Light Truck Cone Kit, $250.00 Value!  (optional dually truck cone kitBeware! - Some brand X balancers offer 4 old style cones that only go up to 5" center holes in the hope they can sell you a 5th cone set to do trucks for another $270.00 - Buyer Beware!  Less cones that do more,...That's Cool!   

Also Beware of some brand X balancers that claim to be "Professional Grade or Commercial Grade" yet only use a 1/4 H.P. motor compared to our True Rated 1/3 H.P. motors.  The Weaver® W-937-40 and W-957-40 balancers are true Commercial Grade machines.  

The Weaver® W-937-40 is manufactured by Nexion and carries a 1-year limited warranty. Nexion is the Italian Manufacturer Nexion SpA which owns the Italian Brands; Corghi, HPA Faip, Mondolfo Ferro, Orlandini, Sice, Tecnomotor, Teco and Bright. Nexion is a worldwide leader in wheel service equipment since 1962 and is recognized internationally for their reliable and accurate products due to the oversight by the Italian Design Engineers. All wheel clamp style tire changers in the world are a result of Italian invention. 

All Weaver® Brand Equipment is manufactured in ISO9001 certified factory with products that have earned the CE certification as labeled on every machine. Nexion has consistently built and provided components to some of the largest brand name products throughout Europe, Asia and the USA including Bend Pak tire changers, Ranger tire changers, Corghi tire changers, Dunlop tire changers, Bosch tire changers and many more. We are simply providing some of their best products Direct to you at the lowest possible price.

Parts are in stock for immediate support on all of our Weaver® models.  We have sold and serviced these models since 2007 with an excellent track record and warranty levels that are consistently at or below the Big Brand names.  We believe all of our Weaver branded products provide the highest quality at an unbeatable price.  Since 1984, Derek Weaver Company has only carried products that we can stand behind with confidence to deliver the results we all desire.       


  • Hood not included, if required see W-957-40
  • Low Speed Technology
  • Accurate to 1 gram
  • Self Calibrating-requires 15" or 16" steel wheel and tire
  • Weight Storage
  • Accessory Pegs
  • 8” Long 40MM Shaft
  • Four Cones
  • ST, AL1, AL2, AL3 Balancing Modes
  • Speed Nut, Weight Hammer and Caliper Standard Accessories
  • Optional Motorcycle Wheel Balancer Kit
  • Optional Truck Kit


  • Data Entry: Keypad
  • Shaft Size 8" x 40mm
  • Tire Diameter: 39"
  • Rim Width: 1.5"-20"
  • Rim Diameter: 10"-24"
  • Small Cone: 44mm - 65mm (1.73 - 2.56") For 40MM Shaft (inside mount W-TB-P-0300031)
  • Medium Cone:54mm - 78mm (2.13 - 3.10") For 40MM Shaft (inside mount W-TB-P-0300032)
  • Large Cone: 74mm - 108mm (2.91 - 4.25") For 40MM Shaft (outside mount W-TB-P-0300033)
  • Truck Cone: 90mm - 158mm (3.54 - 6.22") For 40MM Shaft (outside mount W-TB-P-0300034
  • Truck Spacer Ring (W-TB-P-0200010)
  • Tire/Rim Weight Capacity: 143-lbs.
  • Accuracy: 1 gram
  • Power Requirement: 110 Volt 60Hz 1 Phase 20 Amp
  • Dimensions : 40" Tall x 42" Width x 24" Depth
  • Shipping Weight: 359-lbs.
  • Motor: 1/3 H.P.

WARRANTY - All Weaver® Brand Wheel Balancers and Tire Changers carry a 1 Year Warranty.  Our CE Certified Wheel Balancers and Tire Changers are NOT limited by this warranty and also carry a 1 Year Warranty on all Electronic Components.  Weaver® Brand Wheel Balancers and Tire Changers are non-returnable/non refundable items.  Warranty defects will be solved under the machine warranty.  Beware of sellers who claim higher quality electrical components and yet will not warranty them beyond 90 days!

With the optional motorcycle wheel mount kit you can also balance a wide range of motorcycle wheels by simply switching the shaft mount and using the MOT button on the keypad.


The Weaver® W-937-40 is proudly manufactured by the Italian Group Nexion SpA.  Nexion comprises nine major Italian wheel service brands: Corghi®, HPA Faip®, Mondolfo Ferro®, Orlandini®, Sice®, Tecnomotor®, Teco®, Bright®, and Stenhoj®.  Based in Italy, Nexion has operations worldwide, including manufacturing centers in Italy, Europe, and Asia.footer-nexion.png

38 Reviews

  • 5
    Works perfect, fast delivery

    Posted by Paul McCoy on 8th Jul 2024

    Good deal and works perfect.

  • 4

    Posted by Steve townsley on 24th May 2024

    Absolutely awesome for car tires, struggling a little on Ram capped 20 inch tires. Balancer will do it no question but getting them set is difficult with available hardware. Other than that amazing, factory reset no issue, calibration perfect.

  • 5
    Balance Anything

    Posted by Alex F on 15th May 2024

    I have been using this balancer for almost 4 years now and have never had a customer come back for a bad balance. Once you learn how to do it right, you can balance anything. I've worked on 6-figure cars and gotten perfect balance on low profile 21", 22" - no problem. You don't need a $15,000 road force balancer to work on Alfa Romeo, Mercedes, Rivian, Tesla, etc. As long as you know the fundamentals and not to counter-balance, know how to read the tire dots, etc. I would buy another one of these in a heartbeat. Still going strong after hundreds and hundreds of tires.

  • 5

    Posted by Kerry Stark on 30th Apr 2024

    So far I really like this balancer. I wanted a balancer with a 40mm shaft and this one does. It runs smooth and the 110 volt motor can handle the wheels very well. My old balancer was 220 volts so I was hoping these 110 volt machines could handle the weight of some wheels and tires and this one does. The calibration process is easy to do. Im not a professional, just a car hobbyist, so I wont be abusing this balancer, but there is no doubt that this machine could also handle continuous use if it had to. Looking forward to using it more and more.

  • 5
    WB-937-40 Wheel Balancer

    Posted by Kerry Stark on 11th Apr 2024

    I recently purchased and received my new WB-937-40 Wheel Balancer. These balancers are packaged very well. Everything is wrapped and secured inside the crate. It arrived with zero damage. The 937 balancer is very easy to operate. Its built solid and comes with the necessary manuals needed. I like the 40 mm wide shaft that so many of the other brands do not have. I also love the fact that Derek Weaver has posted videos on their website pertaining to the unpacking, operation, and calibration of these machines. The balancer came with a great assortment of accessories (cone, gauge, and locking nut handle) so everything is included to get started balancing wheels. I had a question about the calibration procedure so I sent an email to Derek Weaver and within hours I had a reply. I find that their customer service and support is excellent. All I can say is that so far I love this balancer and I also love Derek Weaver's excellent customer support. I would highly recommend a Derek Weaver balancer if you are in the market to need a balancer. Im just a home owner that has a car hobby and I love the fact that I can do all my own tires. This WB-937-40 will be a great garage tool for what I want to do. Hats off to Derek Weaver!!!! Kerry Stark Shamokin Dam, PA

  • 5
    937-40 wheel balancer

    Posted by Lee Sawyer on 31st Aug 2023

    I went back and forth on this item. I was trying to find a used balancer to save some money. There were other brands out there that had issues, outdated and were even more expensive. After speaking with Weaver multiple times I was very pleased with how great the customer service was when I had not even bought anything yet. Everything was answered. I pulled the trigger. The shipper was great as well as the whole process. I absolutely love this machine! It is well worth the money and I have no regrets. Machine is easy to use and has proven to be very accurate. Customer service after the sale is still top notch. Thank you for a great machine!

  • 5
    Weaver Balancer

    Posted by Dave Logan on 6th Dec 2021

    I agree with other posters. You need a appointment for any tire service with poor results. I've wanted a tire balance machine for 30 years. Ended up buying the tire mounting machine too.

  • 5
    Nice balancer

    Posted by Anthony Santana on 17th Jun 2021

    Extremely accurate I love it. It did take almost a month and a half to get but that was ok Dum (dumb covid) . It should save me a lot of money, I did all large tires and some small tires for a living 35 years. This machine is the same as other brands but this is the best price! Can't go wrong with it.

  • 5

    Posted by Daniel Winship on 5th May 2021

    It was easy to set up the delivery was awesome and the overall ordering of the equipment and dealing with the company was superior

  • 5
    Great Machine

    Posted by HERB ANDERSON on 5th Apr 2021

    Simple to setup and use. Balanced the summer tires on my wife's car using stick-on weights and also did my 3/4 ton pickup using standard hammer on weights. Both worked well and drive nice and smooth down the interstate. Great product. Will be back in the future to upgrade my old tire changing machine.

  • 5
    Wheel balancer W-937-40

    Posted by Steve on 31st Dec 2020

    This product is great. Nicely delivered. Operates very smoothly and efficient. Very easy to setup and calibrate. I would definitely recommend to others. Couldn’t be happier.

  • 4
    Works great

    Posted by Chris minton on 29th Dec 2020

    Working great

  • 5
    works great - easy to operate

    Posted by ELMER STUHR on 11th Dec 2020


  • 5
    Wheel Balancer

    Posted by on 21st Oct 2020

    I bought this for my own home use I have five vehicles it is a pain in nick to make appointments all the time then they are not done right this w-937 does what it is supposed to iam very happy with it

  • 5
    W-937-40 Balancer

    Posted by Ken on 15th Sep 2020

    Excellent quality, shipped as promised,helpful driver, used with excellent results

  • 5
    W 937- 40 balancer

    Posted by Gary Heffmer on 3rd Sep 2020

    I've had my W 937-40 balancer about 4 years now. I'm very satisfied with it. Also customer service is excellent.

  • 4
    Weaver 937-40 balancer

    Posted by Bryan on 28th Aug 2020

    Great balancer for the money. Watched the calibration video on their website and followed along to calibrate the balancer before use. It was easy to set up and start balancing. I’m a few dozen tires in now with no issues. The only thing I wish this balancer could do is balance larger truck tires (11R 22.5’s). Otherwise it is a great balancer for the money!

  • 5

    Posted by Bill on 4th May 2020

    I pick this machine for my own personal use very pleased with it.the video was very easy to understand and they ship very quick

  • 5
    The balancer did great job

    Posted by James on 8th Jan 2020

    First set done on 2018 Honda civic conversion 17 to 18 inch low pro continental tires,did a great job on hidden inner wheel weights

  • 5
    937-40 balancer

    Posted by Scott on 18th Dec 2019

    Great balancer for the money!

  • 5
    Well done Mr. Weaver!

    Posted by John K on 12th Oct 2019

    The W-937-40 is a great and easy-to-use machine. The set up was straight-forward and I get great results. I’ve already fixed a bad balance from a professional installer. I highly recommend this machine.

  • 5
    957-40 Wheel balancer

    Posted by Bob on 2nd Oct 2019

    Very pleased with balancer Fast shipping and Friendly service. Simple asembly and easy to uncrate. Recomend watching YouTube video on calibration. Highly recomend. Thanks Cameron!

  • 5
    Works good

    Posted by Jesse on 31st May 2018

    Great price - free shipping - hard to beat the price! Had it shipped to Washington with no issues. Works perfect.

  • 5
    Excellent price easy to use

    Posted by Ryan on 17th Nov 2016

    I bought this balencer to use for auto and motorcycle tires. It works excellent. Thanks for a quality product at a great price.

  • 5
    W-937 Good Value

    Posted by Gary on 18th Sep 2016

    I bought a Derek Weaver W-937 balancer to replace an older balancer. Nice machine, Excellent Tech support if you need it. Good value, takes up very little space. I did have a problem but it ended up being the wheel. Balanced 4 more alloy wheels today, works perfect.

  • 4
    simple, works

    Posted by Unknown on 14th Sep 2016

    Does what it is supposed to. Easy to operate, does a good job, tires run smooth. Instruction manual poor. Just watch the videos. Especially the calibration. I like not having a hood, simple. This is used on a farm, lots of vehicles, kids cars etc.

  • 5
    Excellent Value

    Posted by Mike on 19th Jan 2016

    I had my balancer held at the local freight terminal. Pickup was easy and convenient. Set up took just few minutes. I have tried it on a variety of wheel styles and it it easy to set up and use. Perfect for my race car tires and all my street vehicles.

  • 5
    Great price, works perfect A+

    Posted by D on 27th May 2014

    I was tired balancing tires elsewhere paying big bucks and getting frustrated with the results so I have decided to buy my own machine let me tell you one of the best decision I have made and now my tires are balanced to perfection.

  • 4
    Works like a champ!

    Posted by Jeff on 22nd May 2014

    My balancer works very well, hopefully i can get years of worry free use out of it, my only complaint is takes longer to come to a stop,might be just me being used to my old balancer, but other than that, i really like it, so far so good!

  • 5
    Fantastic price, and works great

    Posted by Steve Kotalik on 25th Dec 2013

    I'm very pleased with how this balances wheels. I've done 20 so far. I did the calibration as instructed, and found it was still good from the factory, and shipping around the world, and then to me, so I'm pleased with what I believe to indicate a good design that is immune to vibration shock. One issue is the quality of the instruction manual. The printing of the manual in gray scale leaves it confusing relative to the button press operations. This is corrected by downloading a new manual, which has not been updated for the design changes. The other issue I can think of is the top needs to have a different design to hold tools and other items that are outside of the weight trays. Like special trays for self adhesive weights that come in strips, and utility knife tray, and other such tools that would be used outside of clipon weights. The hammer pliers tool included needs such a tray storage location vs just laying on top of weight trays. But for the price, it works flawlessly. As I'm a newbee to this type of machine, the many youtube videos were helpful.

  • 5
    nice working machine

    Posted by big d on 15th Oct 2013

    I am pleased with this machine,it does nice job.I took my car on highway on high speed and it rides perfect.

  • 5

    Posted by Joe on 1st May 2013

    Bought this balancer in a combo and love both. There is no reason to buy a 2,000 dollar machine. Quality is great. works perfect. would highly recommend this balancer to anybody.

  • 5
    Great balancer

    Posted by Buck on 17th Feb 2013

    Works as goods as my coats machine. We're a small shop & this balancer holds up against the big name brands. we love it. easy to use & the price can't be beat. I'd by another for sure.

  • 5
    great machine

    Posted by elwood on 15th Feb 2013

    have had almost 1 year this balancer works as good as the more costly one i use at work i have a small shop at home and the compact size ia really great so was the price

  • 4
    Good machine

    Posted by Scotty on 15th Feb 2013

    Works well in my motorcycle shop and can still ballance my suv tires on my service truck and put the big tire adapter so I can balance custmers 300 chopper tires too

  • 4
    great product for your money

    Posted by Don on 15th Feb 2013

    We love it. We have a fleet of vans that we were having to for 20 to 30 dollars to get a tire changes out or repair but now we do all of our own tire issues and save the company a ton of money.

  • 5
    good machine for the money

    Posted by Louis LeBlanc/ LeBlanc's Tire Shop, Hannibal MO on 14th Feb 2013

    I bought this machine because I started a used tire shop. I use the hell out of it everyday and it still works great. Couldn't be happier!

  • 4
    best bang for your buck, HANDS DOWN!!!!

    Posted by mark deschaine on 2nd Dec 2012

    Pretty much ready to use right out of the crate. Extremely accurate. Have used mine for 1- year, and no problems yet. Love balancing my own tires instead of paying $12-$15 per tire. Well worth the small investment.

Starter Guide:
Quick Start Guide
Operation Manual
Parts Manual
Factory Settings:
Factory Settings Manual

Derek Weaver Company is proud to offer our high quality products with free shipping or warehouse pickup. Here's how it works...


All Products on our website are offered with "Free Shipping". This means the freight charges are included in the price. Most of our products weighing less than 800-lbs. are offered with “Absolute Free Shipping” which means there are no extra fees. In this case you will notice the phrase “FREE SHIPPING! Includes Free Residential and Free Lift Gate Service!”, in the description of the products page. Absolute Free Shipping also means there are no additional fees for Liftgate Service or Residential Delivery. The only additional fee that you may incur would be if the address were changed during shipment which would incur a reconsignment fee by the freight carrier that we would only pass on if it were not our mistake.

For equipment over 800-lbs (most 2 & 4-Post lifts) there are some limitations for Free Shipping depending on weight and delivery location. In this case you will notice the phrase “Free Shipping To Over 85% of the USA - See Where It's Free” in the description of the products page. Most of the USA will require no additional fee. This applies to over 85% of the continental USA (lower 48 states). Free shipping does not apply to Alaska or Hawaii. Some parts of the country are affected by higher freight rates due to the combination of weight and delivery location which will require a small additional charge to cover the higher rate charged by the freight carriers. Our shopping cart will not calculate the difference (added fee), so we will contact you if this is the case. Rather than advertise the higher rates across the board we choose to show the lowest possible cost to most of the country. Like “Absolute Free Shipping” there will be no extra charge for lift gate or residential delivery. The following areas may have additional freight: North Western US, North Eastern US, Long Island, Western Colorado, the Dakotas, some parts of Florida & California and any area deemed a remote location by the freight company. Prior to ordering give us a call at 817-560-9510 or email and we can provide accurate information regarding Free Shipping or any additional charges.


Shipping and delivery time given during the freight quote process is an estimated time of delivery given by the carrier. Choosing Liftgate Delivery may extend delivery times due to limited liftgate equipment at the delivering terminal. Meeting the delivery schedule is subject to the day the freight is shipped and the carrier’s ability to meet their schedule. Derek Weaver Co., Inc. does not guarantee that a carrier can meet their projected delivery time but we will provide you with the proper tracking information by email so you can follow the tracking time and arrange for special delivery needs with the carrier as needed. Any additional fees incurred as a result of consignee being unable to meet scheduled delivery time or cause for redelivery or reconsignment to a different location will be at consignee’s expense.


Choosing Residential may extend the estimated delivery time due limited liftgate trucks at the delivering terminal, additional communication and handling by the freight company. Please keep this in mind when choosing residential delivery.


Make sure you can unload the freight. A forklift or lifting equipment is required for items over 800-lbs. The trucking company is only responsible for delivery to your loading dock if delivered to a business address or curbside if a residential lift gate delivery. Lift gate service is available for some equipment and can assist in unloading 2 and 4-post lifts however you will still need a forklift. Liftgate capacity is typically 1000-lbs and cannot unload a 2 or 4-post lift on its own.


If you are unable to unload a truck, we have the option of letting you pick the freight up at the closest terminal to your location. When picking up at a terminal, the freight company will load your truck or trailer for you which is included in the freight cost. Call our office (1-817-560-9510) to determine the location of the closest terminal. If you require terminal pickup please place a note in the comment box requesting terminal pickup and we will contact you with the terminal location. Covered trailers or trailers with ramps are not acceptable as they prevent the forklift from getting the load into the trailer. They will not drive onto a ramped trailer. Please remove the ramps prior to picking up if possible.

All shipments must be inspected immediately upon receipt



Choose this option if you have minor dings and scratches or a part that needs replaced to make the unit satisfactory. Make note of the damage before you sign the freight bill. You will be responsible for filing the freight damage claim with the carrier. Derek Weaver Co, Inc. will provide any replacement parts or touch up paint needed should you choose this option and the carrier should provide for reimbursement. If you have any questions or need further assistance, please call our customer service department @ 1-817-560-9510


Choose this option if the carrier has severely damaged the freight beyond your judgment of a simple repair. Derek Weaver Co, Inc. will file all freight claims. Get a copy of the freight bill from the truck driver and email it with a brief explanation of the situation to us. A replacement will be shipped as soon as we verify possession of the freight with the carrier.


If you would like to pick-up the item at one or our warehouses, please call ahead to make sure the item is in stock and schedule your pick-up. Picking up at our warehouse will save you in freight fees but will require sales tax to be collected. If you do not see a pickup price on our website for the product you are interested in you may call our office for more information.

In Texas we load Monday – Friday by appointment only.

In North Carolina we load Monday – Friday by appointment only.

All Two Post and Four Post Lifts require trailer for pickup. Be prepared for pick-up by understanding the item’s weight and dimensions and using the proper truck and/or trailer for hauling. We cannot load open or enclosed trailers with ramp gates. Our warehouse will load the item onto your vehicle and/or trailer but is not responsible for properly securing the load on your vehicle and you will need to make sure you have the proper straps and equipment for hauling. All items for local pick-up are charged state sales tax at the appropriate local rate. If you have any questions or need further assistance, please call our customer service department @ 1-817-560-9510

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