Brand new old stock, ex bike store display item. Never fitted, never used, but no box and one small nick to paint surface by one chainring bolt (see last pic). Condition is therefore a 9.8 out of 10.

24mm axle standard works with GXP. Also compatible with Shimano Hollowtech II BB’s and any external cup system that uses a 24mm axle. You may need additional 24mm axle/BB spacers to fine tune fit, which are readily and cheaply available on eBay, just search “GXP spacers”.

I personally run this chainset on my Litespeed Cohutta, which has a PF46/PF30 BB and I run a Problem Solvers E46 24mm adapter BB with some regular GXP 22/24mm axle spacers to fine tune the axle fit. I’ve also run it with a regular Shimano HT2 threaded BB my other bike (Lynskey Pro Helix). The rest of my drivetrain is Shimano XT & XTR and it works superbly - the XX chainset has the best front shifting, noticeably better than my original XTR.

It is marketed as 10speed but works with 9, 10 and 11 speed. Probably good for 12 speed as well, although I haven’t tested it personally so can’t say for sure.

I was actually keeping this as a spare but my original is proving so durable I’m just not going to need it! The rings are excellent quality and very hardwearing.

It is simply the best 2x chainset ever made. The low 156mm Q factor is much narrower than Shimano etc and is essential for people with narrower hips and/or people with knee problems from riding on cranks with too wide a stance width!!

Crank length is the traditional standard 175mm which is ideal for tall/long legged riders and riders who want the extra torque for steep sections/more instant acceleration given by a longer crank.

Please check compatibility with your frame - frames with VERY wide chainstays are not compatible with this narrow Q156 version. There was more than ample clearance on both my Cohutta and my Helix 29er. Again check this before purchase as no returns are accepted.

SRAM specs:

Delivering amazing performance and durability, the Sram XX is the ultimate 10 speed chainset. Specifically designed for 2x10 the Sram XX 10 Speed Chainset has been designed using the world's most advanced material science.

Oversized chainrings have been CNC machined from 7075 aluminium which when combined with an increased BCD and the two-piece insert-moulded carbon crankarm the Sram XX offers impressive stiffness and power transfer to create a highly responsive riding feel.

24mm standard GXP axle.

In addition to offering serious weight savings, the Sram XX Q156 10 Speed Chainset also provides a narrow Q-Factor, more ankle clearance, greater bearing durability and a stronger crank to offer the ultimate performance.

Retail was £525 with prices of comparable top-of-the-range cranks constantly rising so grab the best crankset ever while you can.