Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 5, 2013 16:40:24 GMT
Hi I've been looking around on here for a bit, mainly too avoid revising, and I think I want to do the upgrades below from another thread to improve my ride and hopefully sort out some of the gear changes I've been having, the front mech seems to change sprockets easily but having got that sorted the rear cassette doesn't like me at all anymore. I was just wondering what sort of tools are needed and how difficult a job it is to change the cassette and chain? Would I need to change any other parts on the bike for compatibility or anything like that? While I'm asking whats the best way to grease the chain and gears and the wheel hub which I may aswell do if I'm taking things apart as it seems like an important job? DO people just use a spray on lubricant or a more solid grease and rub it on? SRAM PG850 Cassette (12-26) - From Wiggle Β£20.00 www.wiggle.co.uk/sram-pg850-8-speed-cassette/SRAM PC850 Chain - From Wiggle Β£10.00 www.wiggle.co.uk/sram-pc850-8-speed-chain/Read more: triban3owners.freeforums.net/thread/167/shimano-r501-wheelset-pg850-cassette#ixzz2VMPGPv6NI'm new to bike upgrades so apprecitate any adivce Cheers
|
|
|
Post by psyclepath on Jun 6, 2013 15:42:58 GMT
IMO there's little point changing the cassette and chain unless you want a higher or lower ratio. Going from 12-25 to 12-26 would not even be noticeable (how often do you use the large sprocket). The standard sprocket maybe a Sunrace or whatever, but is perfectly serviceable and changing will not make any real difference to shifting.
You will need a cassette tool, (around Β£4-5 on Amazon) and a chainwhip to remove the cassette. It is possible to make your own chainwhip using an old chain and a bit of wood though, you basically only need something to hold the sprocket from turning whilst you unscrew the centre lockring.
What is the exact problem with your rear gears? If it's just bad changing then a little adjustment on the barrel adjuster on the rear mech may sort you out. Start by turning it qtr turn anticlockwise. Shifting should get better each turn, if not turn clockwise in small increments.
It the chain is slipping over any of the rear sprockets though, that would suggest a worn chain, which should be replaced, along with the cassette.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 6, 2013 22:19:40 GMT
The problem with my rear gears is just bad changing, I tried a bit of adjustment when I was out this evening but it didn't seem to help at all, in fact it is now making more angry noises that before. I shift up or down and by the time the change happens I have forgotten that I actually changed. It only seems to be happening on the top three rings on the cassette, the lower gears change fine but I don't use them that much. When I get chance I'm going to give it all a good clean and regrease then try adjusting it again. It did feel as if the chain was slipping slightly but I'm not sure if that was just bad gear changes because the alignment is out?
|
|
|
Post by captslog on Jun 7, 2013 8:43:09 GMT
The problem with my rear gears is just bad changing, I tried a bit of adjustment when I was out this evening but it didn't seem to help at all, in fact it is now making more angry noises that before. I shift up or down and by the time the change happens I have forgotten that I actually changed. It only seems to be happening on the top three rings on the cassette, the lower gears change fine but I don't use them that much. When I get chance I'm going to give it all a good clean and regrease then try adjusting it again. It did feel as if the chain was slipping slightly but I'm not sure if that was just bad gear changes because the alignment is out? Top as in smallest rings then, but which ring on the front when this happens? You know about 'cross-chaining' don't you?
|
|
|
Post by psyclepath on Jun 7, 2013 9:34:14 GMT
You'll know for sure if the chain is slipping when you stand up on the pedals to pull away and the crank will just go from under you, it's actually quite dangerous. It doesn't sound like that to be honest. If it's taking ages to change up (from smaller to larger rear cog), that sounds like the cable isn't tight enough, so turn the adjuster anticlockwise. If it's hesitating to change down(larger to smaller cog), that is likely the cable is too tight, so turn the adjuster clockwise. If your chain and gears are exceptionally dirty then this will not help changing gears, though they do have to be pretty gunked up for them to start causing problems in my experience. Also, what do the teeth look like on your rear cogs? If they are looking all pointy like sharks teeth then the cassette may be worn out (compare a well used gear to a less well used one) In my experience though a worn chain and cassette won't massively impact the gear changes, so it sounds like a simple adjustment issue causing your main poor gear changing.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 7, 2013 9:52:06 GMT
The problem with my rear gears is just bad changing, I tried a bit of adjustment when I was out this evening but it didn't seem to help at all, in fact it is now making more angry noises that before. I shift up or down and by the time the change happens I have forgotten that I actually changed. It only seems to be happening on the top three rings on the cassette, the lower gears change fine but I don't use them that much. When I get chance I'm going to give it all a good clean and regrease then try adjusting it again. It did feel as if the chain was slipping slightly but I'm not sure if that was just bad gear changes because the alignment is out? Top as in smallest rings then, but which ring on the front when this happens? You know about 'cross-chaining' don't you? Yeah Top as in the smallest ring, its happening when I'm on the largest ring at the fornt so if my idea of cross chaining is correct that shouldn't be a problem
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 7, 2013 9:53:08 GMT
You'll know for sure if the chain is slipping when you stand up on the pedals to pull away and the crank will just go from under you, it's actually quite dangerous. It doesn't sound like that to be honest. If it's taking ages to change up (from smaller to larger rear cog), that sounds like the cable isn't tight enough, so turn the adjuster anticlockwise. If it's hesitating to change down(larger to smaller cog), that is likely the cable is too tight, so turn the adjuster clockwise. If your chain and gears are exceptionally dirty then this will not help changing gears, though they do have to be pretty gunked up for them to start causing problems in my experience. Also, what do the teeth look like on your rear cogs? If they are looking all pointy like sharks teeth then the cassette may be worn out (compare a well used gear to a less well used one) In my experience though a worn chain and cassette won't massively impact the gear changes, so it sounds like a simple adjustment issue causing your main poor gear changing. That sounds like the problem, I'll spend a bit more time adjusting it then and I will check wear on the sprockets. Thanks for your help
|
|