MTB question- Gear selector adjustment - SV650.org

andrewsmith · 18-04-12, 11:36 AM

Just after a bit of advice on adjusting the gear selectors on a MTB.

Last time I had a fiddle it went wrong badly. The set up is Shimano Alivio 8 speed rear 3 front.

Thanks in advance

maviczap · 18-04-12, 11:38 AM

Which front or rear?

andrewsmith · 18-04-12, 11:38 AM

Both seem to be doing it

maviczap · 18-04-12, 11:47 AM

Rear (lift wheel off the floor if poss) - select the smallest rear sprocket, does it shift cleanly to it, if so change up 1 cog.

If it doesn't shift up, then use the adjuster on the mech where the cable goes through, turn it anti clockwise until it shifts up to the sprocket. By undoing the adjuster you're putting the cable under tension., which is how the index shifting works.

If its not shifting cleanly up or down at all, it might be time for new cables

Front - similar process, just put some tension in the cables by using any adjusters fitted, if not undo the cable clamp on the mech and pull the cable tight.

18-04-12, 12:29 PM

Thats pretty much it, keep going up and down the gears to make sure each one selects smoothly, i have my own way but won't complicate here.

18-04-12, 01:50 PM

There's an online guide for bike fiddling which might help.

front adjustment
rear adjustment

andrewsmith · 18-04-12, 02:00 PM

cheers lads might get it done later on if the rain stops

18-04-12, 02:02 PM

http://youtu.be/SjJfKO_tAo0

andrewsmith · 22-04-12, 12:15 PM

To give you all an update.
The front was at fault and need loosening it may need a new cable as its fraid slightly

18-04-12, 11:36 AM	#1
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	MTB question- Gear selector adjustment Just after a bit of advice on adjusting the gear selectors on a MTB. Last time I had a fiddle it went wrong badly. The set up is Shimano Alivio 8 speed rear 3 front. Thanks in advance __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

18-04-12, 11:38 AM	#2
maviczap Member Mega Poster Join Date: Mar 2007 Posts: 9,096	Re: MTB question- Gear selector adjustment Which front or rear? __________________ We're riding out tonight to case the promised land Make everyday count RIP Reeder - Jolly Green Giant and comedy genius

18-04-12, 11:38 AM	#3
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: MTB question- Gear selector adjustment Both seem to be doing it __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

18-04-12, 11:47 AM	#4
maviczap Member Mega Poster Join Date: Mar 2007 Posts: 9,096	Re: MTB question- Gear selector adjustment Rear (lift wheel off the floor if poss) - select the smallest rear sprocket, does it shift cleanly to it, if so change up 1 cog. If it doesn't shift up, then use the adjuster on the mech where the cable goes through, turn it anti clockwise until it shifts up to the sprocket. By undoing the adjuster you're putting the cable under tension., which is how the index shifting works. If its not shifting cleanly up or down at all, it might be time for new cables Front - similar process, just put some tension in the cables by using any adjusters fitted, if not undo the cable clamp on the mech and pull the cable tight. __________________ We're riding out tonight to case the promised land Make everyday count RIP Reeder - Jolly Green Giant and comedy genius

18-04-12, 12:29 PM	#5
Urbanfireblade Guest Posts: n/a	Re: MTB question- Gear selector adjustment Thats pretty much it, keep going up and down the gears to make sure each one selects smoothly, i have my own way but won't complicate here.

18-04-12, 01:50 PM	#6
Venom Guest Posts: n/a	Re: MTB question- Gear selector adjustment There's an online guide for bike fiddling which might help. front adjustment rear adjustment

18-04-12, 02:00 PM	#7
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: MTB question- Gear selector adjustment cheers lads might get it done later on if the rain stops __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

22-04-12, 12:15 PM	#9
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: MTB question- Gear selector adjustment To give you all an update. The front was at fault and need loosening it may need a new cable as its fraid slightly __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

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