Advice needed - bike won't freewheel, rear cassette stiff
Discussion
Took my bike out for a quick run into town this morning, it seems my bike doesn't want to freewheel anymore, the chain goes rather slack and the rear derailleur moves forward when I stop pedaling.
Took the rear wheel off to investigate and the rear cassette is very stiff, it doesn't spin anywhere near as freely as it should do. Is there something I can adjust myself to sort this, or will I probably need to replace the whole freewheel mechanism? I did have a bit of a crash a few days ago so I'm wondering if something was broken in the fall, although on the ride back home that day the bike was fine.
The bike is a Decathlon Rockrider 8.1 with a SRAM X7 drivetrain.
Cheers!
Took the rear wheel off to investigate and the rear cassette is very stiff, it doesn't spin anywhere near as freely as it should do. Is there something I can adjust myself to sort this, or will I probably need to replace the whole freewheel mechanism? I did have a bit of a crash a few days ago so I'm wondering if something was broken in the fall, although on the ride back home that day the bike was fine.
The bike is a Decathlon Rockrider 8.1 with a SRAM X7 drivetrain.
Cheers!
You need to know what the hub is. If it's shimano, remove the axle, catching the loose balls as they fall on the floor and scurry away under the largest item in the room. Then you can put a large allan key (10mm if my memory works), and the bolt that holds the freewheel portion of the freehub can then be removed and replaced. Some hubs, the freewheel is just held on by the axle, so removing the outer locking device allows the freewheel to be removed from the hub, some formula and quando hubs work like this.
If it's of the screw on variety, and not a freehub, then the freewheel forms part of the gear cluster and is replaced along with the gears, which depending on chain wear is new chain time as well.
If it's of the screw on variety, and not a freehub, then the freewheel forms part of the gear cluster and is replaced along with the gears, which depending on chain wear is new chain time as well.
You have a cassette hub, so will need a 17mm and 15mm cone spanners to undo and remove the axle. You then use a 10mm allen key to remove the freehub and replace with new. Best to but some new bearings to replace them when rebuilding (1/4 inch balls 18 off them) and regrease and replace the axle. Not that I did a mates yesterday and luckily I went digging for some new bearings in my boxes of junk as his hub was full off grit and black bearings which were shot.
invest £3 in a lock ring tool too, it will make the job much easier
http://www.jejamescycles.co.uk/ice-toolz-cassette-...
http://www.jejamescycles.co.uk/ice-toolz-cassette-...
norman156 said:
BadgerBenji said:
What brand of hub is it? You need to check you can get a freehub body for it before you start tearing it apart.
SRAM, and I'm yet to find the right replacement part Rather than shelling out on paying someone else to replace the freehub, would it not be an easier and cheaper option to buy new wheel with the freehub already installed, and then transfer over the disc, cassette etc from the old one? This one looks as though it comes with the freehub: http://www.decathlon.co.uk/rear-26-wheel-discvbrak...
The current wheel doesn't seem to be entirely true anyway (I might have buckled it when I came off).
The current wheel doesn't seem to be entirely true anyway (I might have buckled it when I came off).
All sorted now, took it to the lbs and they fixed the problem and serviced the bike for a reasonable fee. Turns out the freehub was fine, the cassette was the problem, apparently there was several missing spacers so the whole thing was too tight and stopping the freehub from turning (or something like that). I'm not the first owner of the bike so I'm assuming one of the previous owners had a tinker but hadn't a clue what they were doing.
Rather pleased to have it back, riding my brother-in-law's knackered old Carrera Hellcat all week has been an 'interesting' experience...
Rather pleased to have it back, riding my brother-in-law's knackered old Carrera Hellcat all week has been an 'interesting' experience...
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