Middleburn RS8 X-Type mountain bike cranks review

Beautifully crafted classics

Our rating 
2.0 out of 5 star rating 2.0
GBP £156.00 RRP | USD $250.12
Middleburn RS8 X-Type crankset

Our review

Beautifully made cranks that are let down by the lack of an external bottom bracket in the box
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These cranks are beautifully made and are both precise and well finished, but we were expecting a bit more in terms of arm stiffness. We measured 1.143mm of deflection on our testing jig, compared to 0.940mm for Shimano’s benchmark XT cranks.


Having said that, the RS8s felt okay underfoot and are certainly stiff enough for the job. Shifting isn’t in the same league as it is for cranks from the big brands, but we do like the slippery, super-durable Hardcote finish on Middleburn’s Slickshift chainrings. This gives a very positive feel once the chain has engaged with the ring.

A bottom bracket isn’t included, which reduces overall value – we’d recommend a Hope unit for £70. We’d also like to see some proper compact double options to add to Middleburn’s already deep vault of options.

However, the finish on the crank arms is incredibly long lasting and robust, and the crank itself is lighter than Shimano’s SLX unit. The RS8 also has a lifetime warranty against manufacturing defects.


* Please note: The price quoted above does not include the chainrings.

Product Specifications


Name RS8 X-Type
Brand Middleburn

Description Ring combinations 42/44/46/48, 32/34/ 36/38, 22/24/26 , Options: Double, single
Weight (g) 786
Features Weight 786g (arms/BB axle/rings/bolts), n/a (BB), n/a (full)
Gearing 22/32/44
Crank Arm Lengths 170mm 175mm