Big Bike Thread

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It's basically a cyclocross bike with fatter tyres and can use disc brakes. For racing UCI doesn't allow tyres over 32mm (I think) or disc brakes.

Wheels on a 29er have the same diameter rims as roadbikes or cyclocross bikes.

edit: Crap quality photo:
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Last weekend I went out on my bike and a few times I had issues with my chain coming off and getting jammed.

First off apologies as I don't know the names of any parts of the bike so this may be a little confusing...

It happened when I changed from the middle gear to the lowest gear on the front derailleur. What happens is that I go from 2nd to 1st and then it comes off down the inside, and because I'm still riding the chain gets caught up and gets dragged round a bit and jams between the frame and the small cog.

It didnt happen all the time, mostly only when I was putting a fair amount of pressure when riding uphill. I try not to put much pressure on the gears when I change them but sometimes it's ineveitable as otherwise I'd just roll back down the hill!

Is this something I can fix? Perhaps adjusting the derailleur so it doesn't push it so far inside? It's a new bike (only a few weeks old) so if it requires more work I might take it back to the shop and get them to look at it, but if it's something I could do myself I don't mind giving it a bash. It's a Trek Hardrock 09, fraid I don't know the specs of it :o

Thanks for any help.
 
I'd ask them to adjust the low screw/angle of the front mech first. Can shift fine during the build up if the mech is held by the cable tension rather than the low screw but after some cable stretch it just moves too far back and hits the chain off.
 
Try and change gear before you need to e.g on the flat approaching a hill, shift down before you get to the base of the hill, or if you need to change whilst applying a lot of pressure to the pedals try and increase your speed a little first so there is less pressure being applied during the gear change. I hope I don't sound patronising, I'm still very new to mountain biking and like to demonstrate what little knowledge I'm learning as I go along, if it can help others then yay :p
 
KnightStalker said:
My Juicy3's are horrible when wet, sounds like a cat is being ran over a 100 times lol, quite funny to roll up to a junction with people at it and slightly pressure the brakes to make them all jump :)
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That's what happened to me, I was coming up to a jitty so slowed down and two people were standing in it, it startled both me and them as I wasn't expecting it.
 
6thElement said:
It's basically a cyclocross bike with fatter tyres and can use disc brakes. For racing UCI doesn't allow tyres over 32mm (I think) or disc brakes.

Wheels on a 29er have the same diameter rims as roadbikes or cyclocross bikes.

edit: Crap quality photo:
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What up with the bars? The drops look like they're pulled out sidewards, looks very uncomfortable.
 
6thElement said:
Take it back to the shop and ask them to check the setup because you're getting chain suck.
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Thanks, had a read up about chain suck and that's exactly what's happening.

Most of the stuff I've read about it points to having old/damaged chans/chainrings. Obviously this is not the case for me as it's a new bike.

Some say it may occur if the chain is very muddy/greasy etc. My bike was very muddy on the ride but it happened 3 times, but that's a bit much if everytime I go riding in the rain it's going to happen.

Could it also be due to the the cables losing tension? I've had it for a bout 3 weeks now and it's done about 100 miles thereabouts, mostly off-road. How long does the 'wearing-in' process take? They guy at the shop said to bring it back after a while and they'll re-tighten all the cables. If I'm around the period of time this will need to be done I could take it in and get it all done at once which would be handy.

Thanks again.
 
monkeypants said:
They look like Midge bars from On-One. Apparently they're really good.
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I've never ridden drop bars off road but if you hold your arms out in front of you your wrists are at 45deg, roughly the same as those sort of flared bars. So for long distance touring/dirt and gravel roads/none techy singletrack I think they should be comfortable. The bike can take a rack and mud guards, so perfect for some trips I'm considering next year and for long training rides over the winter where I don't want to trash my carbon road bike :)

Or I could just buy some skinnier tyres and use one of my MTB's :rolleyes:


:D
 
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