Shimano 11-42 to 11-32

[Cavalol]

Good morning, is it possible to switch from a Shimano 10 speed 11-42 cassette to an 11-32 one on a Pinnacle hybrid bike, without needing another shifter or rear mech? Failing that, is there a more suitable (11-36?) swap?

Thanks in advance.

 

[Webbo2]

I would have thought the mech would be fine but you may need to take some links out of the chain.

 

[ColinJ]

I would have thought the mech would be fine but you may need to take some links out of the chain.

I think it would be that links could be removed rather than need to be removed.

Going the other way is when there would probably be problems without a longer chain!

 

[T4tomo]

I would have thought the mech would be fine but you may need to take some links out of the chain.

give an 11-42 will have something close to a 32 cog in it somewhere, thee is no need to shorten the chain, particularly as not shortening it give you the option to switch back...

However if the chain is at ll worn, its good practice to lob a new chain on with a new cassette.

@Cavalol as long as the cassette is 10sp then change away for whatever more suits your needs....

 

[si_c]

It'll be fine - adjusting the b-tension screw on the rear derailleur to account for the smaller cassette will give better shifting. As @ColinJ says removing a couple of links is not necessary - it really depends on whether you have a front derailleur as well, if not I'd remove 3 links (6 tooth difference between cassettes) to minimize chain slack.

 

[Cavalol]

Brilliant, thankyou very much, guys.

 

[Yellow Saddle]

You will have to shorten the chain under certain conditions.

Shift to small front, small back. Then look at the RD. if the cage is now horizontal or above it, it means that the spring now longer exererts tension on the chain and it could shake out of track on the cassette. It needs to exert some spring tension on the chain and by definiton, the horizontal and above location is a geometric indivation that the chain is now completely slack.

 

[CXRAndy]

Good morning, is it possible to switch from a Shimano 10 speed 11-42 cassette to an 11-32 one on a Pinnacle hybrid bike, without needing another shifter or rear mech? Failing that, is there a more suitable (11-36?) swap?

Thanks in advance.

Yes, should be fine. You may obviously need slight adjustment of indexing and B screw after replacement

 

[figbat]

You will have to shorten the chain under certain conditions.

Shift to small front, small back. Then look at the RD. if the cage is now horizontal or above it, it means that the spring now longer exererts tension on the chain and it could shake out of track on the cassette. It needs to exert some spring tension on the chain and by definiton, the horizontal and above location is a geometric indivation that the chain is now completely slack.

But the new cassette will have the same small sprocket as the old one, so this will make no difference.

My road bike has a 11-36T 10-speed cassette on its rear wheel. It is currently mounted to a turbo trainer that has a 11-28T cassette - no chain alteration needed and just a small tweak of the B-screw.

 

[Cavalol]

Thank you, everyone who replied. I fitted it yesterday, and luckily it is spot on and I've not had to adjust the chain or derailleur etc.