MINI MOTOR RACING EVO TRAINER PLUS

Provided you don’t lose it or wreck it, you’re unlikely to need a new one. The good thing is that, unlike quick releases which are considered part of the wheel and are usually supplied with replacement wheels, the thru-axle forms part of the bike’s frame.

MINI MOTOR RACING EVO TRAINER PLUS

Plus Mavic Speed Release thru-axles (see below) are double threaded with two interleaved threads, again leading to quicker insertion and removal. A coarser thread means that it takes fewer turns to remove the axle, so wheel replacement is faster.

The thread pitch on a thru-axle may be 1.0mm, 1.5mm or 1.75mm. That’s mainly down to the threads used to screw the axle into the frame, where there are different pitches used by different brands. Thru-axle complicationsĪlthough the almost-standardisation of 12 x 100mm front/12 x 142mm rear thru-axles on road bikes sounds great, it’s not all plain sailing and there are plenty of compatibility issues with road bike thru-axles. Boost helps handle the extra power from the motor, but also leads to a better alignment of the chainline from the mid-mounted motors, which are typically wider than a non-powered bottom bracket.īoost thru-axles are found on other Focus bikes too, such as the Focus Atlas gravel bike. You’ll find Boost axle spacing on some road ebikes, like the Focus Paralane 2 and the Specialized Turbo Creo SL.

The Focus Atlas gravel bike comes with Boost axles front and rear. But Boost wheels are incompatible with standard frames, so there are limited options if you want to replace your wheels on a Boost road bike. The extra length means that the bracing angle of the spokes from the hub flanges to the rim is wider, so the wheel is more rigid. Boost wheels and axles are now found on many mountain bikes and this standard is also found in a smattering of gravel bikes and ebikes.Ī Boost front axle is 110mm long and 12mm wide, while a rear axle is 148mm by 12mm. But as with mountain bikes there are a few variants. It leads to a cleaner look and less wind resistance, but does mean you need to carry a tool with you on a ride. In other cases, you need to use an Allen key or multi-tool to remove the wheel because there’s no lever on the axle. Some levers incorporate a quick-release mechanism, which is closed to give you the final bit of tightening on the frame but loosens pressure quickly for easier unscrewing. In some cases, the lever may be removable so you only need one for the pair of wheels – DT Swiss uses this system. Thru-axles often have a lever built into them, which gives you tool-free removal if you need to fix a flat or swap a wheel. One result of that more rigid connection is that bike makers have been able to build frames lighter, helping to bring the weight of disc brake bikes down to a level comparable with rim brake bikes.Ī lever lets you tighten the thru-axle in the frame’s dropout. The thru-axle passes through the dropout on one side of the wheel and screws into threads in the dropout on the other side.Īs well as being more secure, you can exert more clamping force on a thru-axle for a more rigid interface between the wheel and the frame. That means there’s no risk of the wheel falling out as you ride. In a thru-axle system, the dropouts have closed-off circular openings, rather than an open end.

It’s a system that is already used extensively on mountain bikes, where the risk and the result of a wheel coming off is potentially even more dangerous than on a road bike. That’s why bikes typically have “lawyers’ lips” on the fork blades to help keep the wheel in place even if the quick release isn’t adjusted properly, although this does slow down wheel replacement because the adjusting nut on the skewer has to be loosened to remove the wheel. Again this can cause misalignment worst case a wheel could slip out of the dropout completely. James Huang / Immediate MediaĪ poorly adjusted quick-release skewer can allow the wheel to move in the bike’s dropouts under pressure too. Skewers with external cams can be made lighter but are more prone to contamination.

Mini motor racing evo trainer