I have a rockhopper with avid v-brakes. I am thinking of fitting discs instead and was thinking about AVID BB7 mechanical discs (I'm old fashioned and not keen on hydraulics). I have a few queries if you could help please:
1 I was thinking about 185mm front and 160mm rear - or should I go for 185mm both or what about 203mm ?
2 How easy are they to fit (I'm fairly handy)if I buy them online - or should I get them fitted by a shop ?
3 I have avid FR-5 levers - would they be OK or should I go for avid SD-7 levers instead ?
4 Presumably the only other thing I need is a new set of cables as the current cables won't be long enough ?
5 one last thing - the rockhopper has Specialized Fast Trak LK Sport tyres which I find don't grip well esp on loose surfaces, rocks and mud - wondered what you thought - I'm thinking of changing them but not sure what to go for (maybe tioga which I have on my cape wrath which are chunkier albeit with more rolling resistance) ?
Hope you can help
Thanks

