How to measure thru axle. Size confirmation: This thru axle adapter is M1...

How to measure thru axle. Size confirmation: This thru axle adapter is M12 x 1. For kid trailers, trainers, BOB Trailers and more. Mar 20, 2019 · The lack of Thru Axle standards has created a bit of confusion for end users who need to find replacement axles for their frame or fork. Folding Bikes That Fit: Made to Measure for Every Rider Meet Will Chan The Bike Expert Behind our Trusted Partner Victosports in Macau Fighting Climate Change By Tandem Walters Hot Take on the Pro's and Con's of Thru-Axles Action Photos Join Our News Letter Community blog. D. That’s why measuring your thru-axle is so important. You’ll often see hub standards like 12×100 (front) or 12×142 (rear). 12 → axle diameter (in mm) 100 / 142 → dropout spacing (in mm) However, thread pitch and actual axle length are not standardised and vary by brand and even by model year. 5x11 inches), and verify the accuracy of the scale with a ruler. Regular inspection and maintenance of adapters help avoid wear or damage that could compromise trainer safety. Feb 21, 2026 · Selecting the right KKE through axle fork can significantly impact your bike's handling, durability, and overall ride quality. , 100mm front, 135mm rear for road). Feb 5, 2026 · Incorrect or incompatible thru-axle adapters can cause instability, slipping, or misalignment during indoor trainer sessions. g. > Ensure your thru axle has an M12 x 1mm thread Oct 20, 2024 · A thru axle is a type of axle that passes through the hub of the wheel and threads into the frame or fork, providing a secure connection. Material Construction Look for skewers made from chromoly steel (durability) or forged aluminum (lightweight). Designed to work with modern frames that use thru-axles instead of traditional quick-release skewers, these forks offer greater rigidity, improved steering precision, and increased safety during high-intensity riding. Measure the insertion length of your thru axle leaving any washers that your axles may use in place and make note of the insertion length. If your original axle is missing, you’ll need to contact the frame or fork manufacturer and ask them for the four key dimensions. Measure Rake: If replacing a fork, measure the old one or find OEM specs to maintain stable handling. Most 20mm thru axles use either a threaded end cap or a lever-style retention mechanism on one side, while the other end typically features a hex or Torx drive for tightening. Make an informed choice. Misalignment leads to unsafe installation 3. Feb 21, 2026 · 1. In this video, we'll show you how to properly measure your 12mm thru axle so you can replace it with a Robert Axle Project thru axle. Unlike older quick-release skewer systems, thru axles provide increased stiffness, better wheel security, and improved handling precision—especially under heavy braking or off 3 days ago · Verify Axle Standard: Use calipers or consult wheel specs to confirm 12mm thru-axle or QR. 3 days ago · Learn what to look for in a thru axle bike frame, from compatibility and stiffness to wheel security and long-term durability. Check Brake Mount: Flat mount is standard post-2016; older bikes may need adapters. You Nov 19, 2020 · For a front thru-axle, this is measured from the inside to the inside of your fork. Please measure the original axle length and check the thread pitch before purchasing. Proper measurement and compatibility checks are essential to prevent adapter-related issues that derail training. In order to order a replacement axle, you’ll need to know the following: axle diameter, axle length, thread pitch, and thread length. 75 mm fine thread). measurement is often listed for many thru-axles but isn’t necessary if you know the overall length. 2. Axle Standard & Dropout Compatibility Verify whether your frame uses 9mm QR, 12mm thru-axle, or a proprietary system. 3 days ago · The 20mm measurement refers to the axle's outer diameter, which interfaces precisely with the hub bearings and fork legs. Bicycle Parts and Accessories - Modern Bike Measure Your Thru Axle Print this sheet (actual size - 8. This post is intended to help users identify and measure the parameters required to specify a replacement Thru Axle for any frame or fork. The O. For semi-float and C-clip-equipped axle shafts, measure from the end of the shaft to the outer edge of the mounting flange. Measure the hub width (e. Please remove it from the bike for check. 4 days ago · About Steel Bike Frame Thru Axle Disc A steel bike frame thru axle disc refers to a bicycle frame constructed from steel tubing, designed specifically to accommodate thru axles at both wheels and disc brake calipers. > Make a note of your thru axles interface with the bikes, ie if there is taper / tapered washer or flat / flat washer behind the head of your axle. This section shows how to measure your original axle. Nov 11, 2025 · The Variables of Thru-Axles Before we begin measuring, let’s understand a few basics. How to choose: Usually the original axis is printed with a text indicating its length and thread size. Jun 16, 2024 · To measure thru axle length, measure from the center of the u-joint bore to the end of the splines for axles with yokes (front axle shafts). 75 (12 mm diameter, 1. What axle do I need? Follow our directions to determine what thru axle your bike needs. L. For a rear thru-axle, this is measured from the inside to the inside of your frame at the drop-outs. See depiction below showing how to measure your thru axle. How do I measure a thru axle? Feb 21, 2026 · Learn what to look for in a 12mm thru axle screw for MTB and road bikes, including compatibility, materials, and key buying tips. tog pez uht fkq byw dau kxf jzm aha etd rgi krf qym zvx dmx