Dia-Compe Gran Compe Single crankset review

Dedicated singlespeed chainset

Our rating 
3.5 out of 5 star rating 3.5
GBP £149.99 RRP | USD $222.00
Dia-Compe Gran Compe Single Crankset

Our review

Perfect kit for converting your road bike to singlespeed
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This is the sort of chainset you might consider if you’re building a fixie from scratch and want shorter than usual cranks. These cranks are 165mm long – the sort of length that’ll give you extra clearance on a velodrome’s banking and which could also come in handy when cornering on a fixed-wheel bike.


The 130 BCD chainset comes with a CNC-milled 46-tooth chainring in 6061 aluminium and forged 2014 aluminium crank arms, though we’d expect better finishing quality on these for the price. If you’re riding them a lot on salted roads you’re going to have to keep them clean if you want to keep the highly polished finish.

As for compatibility, this’ll need to be matched with a square taper (JIS-type) bottom bracket. A 103mm BB is probably the ideal for keeping a narrow Q-factor (the distance between the pedals), and TA’s Axix bottom bracket would be a sound choice (available in lengths from 103-125mm for around £44).

You’ll also need a 1/8in chain. We’d probably go for something like KMC’s Z510 gold chain, which represents good value at just £6.49. Paired with a 17-tooth freewheel it’ll give you a 73in gear – great for general street riding and the occasional gradient.


Out on the road, the Gran Compe feels reassuringly stiff and efficient, just what you want when riding fixed. Overall this is a pretty decent chainset for creating your own fixie, though the price is on the high side. 

Product Specifications


Name Gran Compe Single Crankset (09)
Brand Dia-Compe

Weight (g) 630
Features 46T
Material Aluminium
Bottom bracket - crank arms connection Square taper
Crank Arm Lengths 165mm