On the road bike, around the 2 hour mark I start to get damn uncomfortable, especially around the groin/seated area. I can spend 3 or 4 hours on the MTB and apart from feeling knackered, I don’t get the same kind of pain at all.
Anyone got any ideas whether this could be down to a bike fit / set-up issue?
I’ve tried changing the saddle and moving its position slightly but its not made much or any difference.
Or do I just need to ride more often on the road to build up tolerance?
Road bike/MTB bike riding positions are totally different in my opinion, as are the riding styles that goes with each discipline.
MTB riding is very upright, shifting position, often out of the saddle, twisting, stopping, etc., etc.
Road is much more, lock yourself into riding position and GO!!!
I’d suggest looking at breaking up your time in the road position by getting out of the saddle now and then, do a few simple on the bike stretches, get on the drops, use the hoods, etc., etc., and see if the problem still persists.
I’d approach it from a “Tolerance” position first and go from there. 😉
Is your riding position quite “sit up” on the road bike? That tends to make my nether regions a bit sore and while it sounds odd, over time as I’ve ridden more and my riding position has changed into a more “extreme” position it’s actually more comfortable to ride. I think because it’s helped to spread my weight between my contact points better.
Also what size tyres are you running? It might not sound a lot, but if you’re on 23c and you can squeeze 25c tyres on your bike it might help take the edge off.