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Late reply; I have done all this nonsense. And yes CJF is right, sizing down tyres is easiest, cheapest, fastest solution. I did not accept this so I:
- Bought wider guards
- Bought a diff frame (the brake bridge placement matters)
- Bought calipers that have better clearance (VO)
And gained 3mm, went from 25c to 28c.
It also looks like you have sliding dropout, play with that, fenderline is important to get more clearance.
Mine are on a fixie with track ends so with chain length and axle placement its very 4D chess.
- Bought wider guards
amey
Arnomatic
Bloody hell... Fitting my rear GB guard this cold morning, and run into an issue. I spent a good while researching these guards, made sure they'd be compatible and bought a few additional spacers and fixings to make the process super smooth. I'd even say I was confident.
Long story short, there's not enough room at the brake bridge, even with the roomy brakes I have fitted. The tyre rubs at the point highlighted in pic 1. If I squeeze the brake (which gives a bit more internal height on the calliper the tyre doesn't rub, but the brakes obviously do.
Even with a little more internal height in the calliper, the L bracket I have to mount the guard to the brake bridge wouldn't pull the guard up high enough without some filing.
Options that I can see:
-Find a rear brake with more height clearance
-Dimple the guard under the brake and use a bracket like below for more clearance
-Use slimmer brake shoes and pads to close up the calliper for more clearance
-Admit my research wasn't great, get rid of the guards (unreturnable now they're out the packaging) and go for another option (suggestions welcome)
This build has been frustratingly slow, so happy to put it to the side for a few days to consider options. Have I missed anything? Surely brake bridge clearance problems are fairly common, so I have my fingers crossed for a genius solution. Thanks all!