Dia-Compe Gran Compe Zero front mech review

Part-carbon front derailleur

Our rating 
1.0 out of 5 star rating 1.0
GBP £39.99 RRP
DIa Compe Gran Compe Zero Front Mech

Our review

Concerns with corrosion and pivot slop
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Once a shift is made, the Gran Compe Zero front mech is capable of delivering fast, efficient changes with the chain easily stepping between chainrings.


Unfortunately, our derailleur had significant slop in the pivots after just one ride and we were disappointed to see both cage plates and the tension spring corroding after only one month.

It may function well now and isn’t overly heavy at 98g (braze-on) but we’re not convinced that performance will last. Because of our concerns we contacted Dia Compe’s UK distributors, Ison Distribution.


The company told us they hadn’t had any other reports about corrosion in the front mech, but were concerned at what we’d found and suggested it could be prevented by the use of lubrication. Dia Compe are looking into the situation and will keep us informed of any developments.

Product Specifications


Name Gran Compe Zero front mech (10)
Brand Dia-Compe

Weight (g) 98
Features *Cold forged alloy bracket & clamp. *Brazed on type only *10-Speed compatible. *Compact drive compatible. *Double holding links.
Available Colours Carbon Silver