Shimano launches flat-mount MTB brakes, Super Boost cranksets and new wheels

New budget Micro Spline hubs also released

New Shimano components

Alongside the headline launches of 12-speed Deore, a new Alivio groupset and new ebike batteries, Shimano is also releasing new 12-speed crankset options, new hubs and wheelsets, and flat-mount calipers for the SLX, XT and XTR groupsets. 

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Super Boost cranksets and more 2x options

Shimano XTR FC-M9130-1_32t crankset
It looks like Super Boost is here to stay.

The Super Boost hub standard, which sees the OLD size (over locknut distance – or, in simple terms, the width of the hub) of a hub grow from 148mm to 157mm is gaining traction. 

In response to this, Shimano has released the XTR FC-M9130-1 1×12 crank. This has a 56.5mm chainline for use with Super Boost rear-ends. The cranks have a Q-factor of 171mm. 

Shimano FC-MT610-B2_36-26t crankset
2x riders will rejoice at this news.

Alongside this, the non-series Deore-level FC-MT610-2/B2 crankset for Boost and standard 142mm thru-axle rear ends provides a cheaper option for brands looking to bring the price of SLX, XT and XTR-equipped bikes down. 

New 12-speed complete wheels and hubs

Shimano WH-MT601-TL
Shimano’s wheels are a popular aftermarket option for riders wanting to upgrade.

Shimano wheelsets are a firm favourite for shops and riders across the land, usually offering decent value for money and reasonable weight in an easy-to-access and widely-stocked package.

Expanding its line of 12-speed mountain bike wheelsets, Shimano has released the WH-MT601.

This alloy wheelset is available in both 27.5in and 29in wheel sizes for 100/142mm or 110/148mm spaced hubs. 

Shimano FH-MT410-B hub
Micro Spline is now available on some of Shimano’s very-cheapest hubs.

Meanwhile, two new entry-level Micro Spline-equipped hubs have also been released.

There’s the MT410, which is available for 142 or 148mm thru-axle spacing, and the MT401 for 135 or 141mm quick-release spacing.

In a huge shift for Shimano, the hubs actually spin on cartridge bearings. Shimano has stuck steadfastly with cup and cone bearings for just about forever, so this is not an insignificant change of course.

New flat-mount calipers for XTR, XT and SLX

XTR flat-mount brake caliper
Flat-mount is gaining traction in the mountain bike world.

Finally, Shimano has also released flat-mount calipers at XTR, XT and SLX levels. 

Flat-mount was originally designed for road bikes but has found favour on certain cross-country mountain bikes because it has the potential to offer a lower overall system weight. 

Only two-piston versions of the brakes are available in the flat-mount format.

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The XTR version is suitable for 140 and 160mm rotors, while the XT and SLX options will accommodate 180mm rotors.