|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Problem with new Shimano Cassette sticky freewheel action
Hi,
I recently overhauled the drive train on my bike, fitting a new Shimano Cassette, New Chain and new chain rings. Sometimes when I stop pedalling the the ratchet or freewheel doesn't immediately work on the cassette so the chain goes slack between the top of the cassette and the chain ring to the point it lands on the wheel stay, the chain on the underside eventually becomes so short that the freewheel kicks in and starts revolving properly. I've ridden about 80 odd miles now hoping it would free up but it hasn't. Is it possible that I've overtightened the locking ring on the cassette or am I just unlucky and have a duff one? It's a Shimano 9sp Deore cassette. Thanks, Wayne. |
Ads |
#2
|
|||
|
|||
Wayne wrote: Hi, I recently overhauled the drive train on my bike, fitting a new Shimano Cassette, New Chain and new chain rings. Sometimes when I stop pedalling the the ratchet or freewheel doesn't immediately work on the cassette so the chain goes slack between the top of the cassette and the chain ring to the point it lands on the wheel stay, the chain on the underside eventually becomes so short that the freewheel kicks in and starts revolving properly. I've ridden about 80 odd miles now hoping it would free up but it hasn't. Is it possible that I've overtightened the locking ring on the cassette or am I just unlucky and have a duff one? It's a Shimano 9sp Deore cassette. Thanks, Wayne. Take the hub apart, remove the freehub body, turn it over, remove the rubber seal, flush and lube with oil, not grease. I use Mobil One |
#3
|
|||
|
|||
"Wayne" wrote in message news:1115032251.11413.8.camel@localhost... Hi, I recently overhauled the drive train on my bike, fitting a new Shimano Cassette, New Chain and new chain rings. Sometimes when I stop pedalling the the ratchet or freewheel doesn't immediately work on the cassette so the chain goes slack between the top of the cassette and the chain ring to the point it lands on the wheel stay, the chain on the underside eventually becomes so short that the freewheel kicks in and starts revolving properly. I've ridden about 80 odd miles now hoping it would free up but it hasn't. Is it possible that I've overtightened the locking ring on the cassette or am I just unlucky and have a duff one? It's a Shimano 9sp Deore cassette. Hey Wayne, Does this only happen on the smallest cogs of the cassette? The inertia of a heavy cassette will keep it rotating if you're pedaling a high cadence and suddenly stop, and the rear derailleur cage doesn't have enough tension to resist that inertia. An overtightened lockring can't cause this issue... all that is supposed to be rigid anyways. The freehub on the inner diameter of the cassette is what makes it all work. If it's "sticky" sticky though, Peter's suggestion's the way to go. -- Phil, Squid-in-Training |
#4
|
|||
|
|||
Wayne wrote:
I recently overhauled the drive train on my bike, fitting a new Shimano Cassette, New Chain and new chain rings. Sometimes when I stop pedalling the the ratchet or freewheel doesn't immediately work on the cassette so the chain goes slack between the top of the cassette and the chain ring Did this start happening right after you replaced those items? If so, it seems like something must have changed. Are you sure the chain is routed correctly and the same length as the old one? If it happened gradually over time, then it's likely the freehub mechanism is gunked up. Art Harris |
#5
|
|||
|
|||
Phil, Squid-in-Training wrote: "Wayne" wrote in message news:1115032251.11413.8.camel@localhost... Hi, I recently overhauled the drive train on my bike, fitting a new Shimano Cassette, New Chain and new chain rings. Sometimes when I stop pedalling the the ratchet or freewheel doesn't immediately work on the cassette so the chain goes slack between the top of the cassette and the chain ring to the point it lands on the wheel stay, the chain on the underside eventually becomes so short that the freewheel kicks in and starts revolving properly. I've ridden about 80 odd miles now hoping it would free up but it hasn't. Is it possible that I've overtightened the locking ring on the cassette or am I just unlucky and have a duff one? It's a Shimano 9sp Deore cassette. Hey Wayne, Does this only happen on the smallest cogs of the cassette? The inertia of a heavy cassette will keep it rotating if you're pedaling a high cadence and suddenly stop, and the rear derailleur cage doesn't have enough tension to resist that inertia. An overtightened lockring can't cause this issue... all that is supposed to be rigid anyways. The freehub on the inner diameter of the cassette is what makes it all work. If it's "sticky" sticky though, Peter's suggestion's the way to go. -- Phil, Squid-in-Training I've been seeing this a lot lately on new bikes, I'd assumed it was too-sticky grease in the freehub bearings and have been leaving it to run in. Interesting that the OP has found it without changing the freehub though. It also happened with a 11-34 7sp freewheel (non-cassette) so I was assuming it to be Shimano grease combined with a very small sprocket. I hadn't considered the inertia thing, but ISTR you can reproduce it by spinning the wheel up to speed in the 11-tooth sprocket, leaving it to freewheel then backpedalling gently, which does suggest it's not entirely inertia. I'll have a poke at one tomorrow and see if I can deduce anything. For the original problem, I think flushing the freehub grease out with oil is indeed your best bet. |
#6
|
|||
|
|||
Wayne wrote:
Hi, I recently overhauled the drive train on my bike, fitting a new Shimano Cassette, New Chain and new chain rings. Sometimes when I stop pedalling the the ratchet or freewheel doesn't immediately work on the cassette so the chain goes slack between the top of the cassette and the chain ring to the point it lands on the wheel stay, the chain on the underside eventually becomes so short that the freewheel kicks in and starts revolving properly. I've ridden about 80 odd miles now hoping it would free up but it hasn't. Is it possible that I've overtightened the locking ring on the cassette or am I just unlucky and have a duff one? It's a Shimano 9sp Deore cassette. Do you have a plastic plate between the cassette and the spokes? Those can drag against the low gear on your cassette -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#7
|
|||
|
|||
A Muzi wrote: Wayne wrote: Hi, I recently overhauled the drive train on my bike, fitting a new Shimano Cassette, New Chain and new chain rings. Sometimes when I stop pedalling the the ratchet or freewheel doesn't immediately work on the cassette so the chain goes slack between the top of the cassette and the chain ring to the point it lands on the wheel stay, the chain on the underside eventually becomes so short that the freewheel kicks in and starts revolving properly. I've ridden about 80 odd miles now hoping it would free up but it hasn't. Is it possible that I've overtightened the locking ring on the cassette or am I just unlucky and have a duff one? It's a Shimano 9sp Deore cassette. Do you have a plastic plate between the cassette and the spokes? Those can drag against the low gear on your cassette -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 Good call Andy. |
#8
|
|||
|
|||
On Tue, 2005-05-03 at 06:56 -0700, Qui si parla Campagnolo wrote:
A Muzi wrote: Do you have a plastic plate between the cassette and the spokes? Those can drag against the low gear on your cassette Hi, Yes there is a plate I'll check this out, thanks. Wayne. |
#9
|
|||
|
|||
On Tue, 2005-05-03 at 06:56 -0700, Qui si parla Campagnolo wrote:
A Muzi wrote: Do you have a plastic plate between the cassette and the spokes? Those can drag against the low gear on your cassette Hi, Yes there is a plastic plate, I'll check this for clearance, thanks. Wayne. |
#10
|
|||
|
|||
On Mon, 2005-05-02 at 16:35 +0000, Marvin wrote:
Phil, Squid-in-Training wrote: I've been seeing this a lot lately on new bikes, I'd assumed it was too-sticky grease in the freehub bearings and have been leaving it to run in. Interesting that the OP has found it without changing the freehub though. It also happened with a 11-34 7sp freewheel (non-cassette) so I was assuming it to be Shimano grease combined with a very small sprocket. I hadn't considered the inertia thing, but ISTR you can reproduce it by spinning the wheel up to speed in the 11-tooth sprocket, leaving it to freewheel then backpedalling gently, which does suggest it's not entirely inertia. I'll have a poke at one tomorrow and see if I can deduce anything. For the original problem, I think flushing the freehub grease out with oil is indeed your best bet. Thanks for all the replies, I'll check the plastic plate first then move onto this solution. Regards Wayne. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
8 of 10 for Shimano 7 Cassette Upgrade to Campy | bigsky | Techniques | 3 | February 1st 05 10:45 PM |
Freewheel for Shimano Sora 7-speed brifters | dcg | Techniques | 25 | January 31st 05 02:15 PM |
Shimano 10-speed Compatible Cassette on Campy Hub | rodq | Techniques | 5 | December 27th 04 08:19 PM |
WTB: Used Shimano to Campy 10v cassette | Ben Brewer | Marketplace | 2 | December 8th 03 06:53 PM |
Suntour rear cogs cassette removal problem | Roger Ehrlich - CSCI/F1998 | Techniques | 5 | July 24th 03 11:24 PM |