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the extra torque going through the drive?
People on geared bikes are putting the same force through their chains, and bending them sideways at the same time. Chain tension is a function of crankshaft torque and chainring size, and Xav doesn't look to have gone for a microdrive set up
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On my regular track sprint and pursuit bikes I run KMC Z610Hx 3/32" chains, never had a problem with them and I'm a big lad. It's mainly because all my kit is 3/32" (a combo of old British Cycling team Blackspire chainrings and DA 3/32" sprockets) but I wouldn't be averse to using 1/8" kit in the future.
The KMC 610 is what I've got on the HC bike above, moving to DA will save a bit of weight over that (and loads over a 1/8" chain) and it's unlikely to break - I've ridden DA 9spd chains on fixed in the past without issues.
I've got a 25t rear 3/32" sprocket which was a bit of a find, the RST Sport/Aero-Coach top womens hillclimber and I ordered one each from Aus off eBay! We're both on ~41" give or take (she has 34x22 and I'm on 38x25), but she has the option to gear down for nationals if necessary.
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gbj_tester
xavierdisley
@Scilly.Suffolk
Is there much to be gained with 3/32" over 1/8" for HC?
Isn't the weight saved quite modest compared with the extra torque going through the drive?
I suppose the fact you've made that choice answers my question, but I'd be interested to know what you took into consideration.