MIDDLEBURN RS7 MTB Square Taper Crank

MIDDLEBURN, a British crank brand, offers sophisticated forged aluminum cranks. Since 1991, their cranks have undergone continuous refinement, and in recent years, they have evolved using modern technologies such as 3D modeling. The company guarantees that their cranks are the stiffest on the market while remaining lightweight.

The RS7 MTB Square Taper Crank is made from “A7075,” an aluminum alloy widely used in the aerospace industry. This material is lightweight yet boasts strength comparable to iron-based alloys (), and the cranks are manufactured through a process of forging and CNC machining.

One particularly clever detail I simply must mention is the finish. After machining, the entire crank is hand-polished, and finally, the logo is engraved and inlaid with ink. It’s not a printed design—it’s the raw, exposed texture of the material that really makes you fall in love with it.

A single accent color against the rugged crank— the “MEDIUM” Alloy Cup Crank Bolts Set is the perfect choice.

[SPEC]

Material: Aluminum AlloyA7075
Compatible BB: Square Taper (JIS)
Included: Lockring (MIDDLEBURN-exclusive)

*Due to the unique shape of the lockring, please also purchase the RO1 SQ Double Road Spider.
* *Crankbolts are not included.