9 speed to 10

StanwaySteve62

Is it as simple as a new shifter and cassete? plus chain I guess and then some adjusting.
Have a 105 deraillier but the front rings say 9 speed?

sungod

shimano 10-speed chain rings are just a smidge closer together and narrower, but probably be fine with a 10-speed chain

change casstte, chain, and shifters, rest should be ok

this document sums it up...

http://www.wheelworks.co.nz/articles/Up ... _Speed.pdf

StanwaySteve62

thx for that

beverick

I asked exactly the same question at the LBS this morning and got the same answer. Cassette, chain and rh shifter is the minimum setup required. The derailleurs are 'dumb' components so will work with either 9 or 10 speed chains as the STIs do all the work - ie dictate the throw. I did wonder if a change of jockey wheels on the rear 'd' may be in order though?

There was a word of warning regarding the amount of wear with the chainrings. The general feeling (although unproven) was that, as the 10 speed chain is narrower than a 9 speed, it may jump or otherwise play up earlier than a 9 speed as either the chain stretches or the cogs lose their profile.

There other fact to consider is that the current 10 speed 105 shifter looks (and feels) different to the 9 speed so it'll spoil the look of the bike and may feel odd until you get used to it but as the shifters are £75-£110 each (all prices from - Chainreaction cycles or wiggle) it may be a compromise to be made.

The prices I wrote down are that twin shifters are £240, a chain is £15-£30 depending on spec and cassette £35-£60 so you're looking at a minimum cost of just over £100 with a single shifter (but probably nearer £200) and, if you change both shifters you're looking between £280 and £300 (a full groupset is £399!).

Interestingly I was also told that, as a 10 speed cassette is narrower than a 9 speed, it comes with a 1mm spacer which should be fitted to a 9 speed hub.

Bob

satanas

I suspect the people you spoke to are morons - not unusual in a bike shop. Many in bike shops make things up as they go along. I think the basic motto is: "Never think, measure or do research when you can lie."

Re chainrings: as long as they aren't worn out any vaguely normal 3/32" chainrings should be okay. I've used 1980s Sugino rings with a Shimano 10 speed chain with no problems. There might be a few low quality rings that don't work, but they definitely don't need to have "10 speed" written them.

Re spacers: 10 speed cassettes require the spacer due to Shimano's ill-advised attempt to change the freehub splines when 10 speed came out. The first DA 10 speed hubs used an alloy body with taller splines, and while Shimano were making things less compatible they decided to recess the back of the cassette spider, possibly to make the body a bit shorter and lighter(?). So, when used on any other hub, the 1mm spacer is required so that everything fits together properly. The spacer has nothing to do with the overall width of the cassette, it's to do with the now extinct, non-standard early 10 speed alu cassette bodies.

satanas

I suspect the people you spoke to are morons - not unusual in a bike shop. Many in bike shops make things up as they go along. I think the basic motto is: "Never think, measure or do research when you can lie."

Re chainrings: as long as they aren't worn out any vaguely normal 3/32" chainrings should be okay. I've used 1980s Sugino rings with a Shimano 10 speed chain with no problems. There might be a few low quality rings that don't work, but they definitely don't need to have "10 speed" written them.

Re spacers: 10 speed cassettes require the spacer due to Shimano's ill-advised attempt to change the freehub splines when 10 speed came out. The first DA 10 speed hubs used an alloy body with taller splines, and while Shimano were making things less compatible they decided to recess the back of the cassette spider, possibly to make the body a bit shorter and lighter(?). So, when used on any other hub, the 1mm spacer is required so that everything fits together properly. The spacer has nothing to do with the overall width of the cassette, it's to do with the now extinct, non-standard early 10-speed-only alu cassette bodies.

beverick

It's bizarre.

You call people morons and then broadly agree with them.....

sheffsimon

satanas wrote:

I suspect the people you spoke to are morons - not unusual in a bike shop. Many in bike shops make things up as they go along. I think the basic motto is: "Never think, measure or do research when you can lie."

Re chainrings: as long as they aren't worn out any vaguely normal 3/32" chainrings should be okay. I've used 1980s Sugino rings with a Shimano 10 speed chain with no problems. There might be a few low quality rings that don't work, but they definitely don't need to have "10 speed" written them.

Re spacers: 10 speed cassettes require the spacer due to Shimano's ill-advised attempt to change the freehub splines when 10 speed came out. The first DA 10 speed hubs used an alloy body with taller splines, and while Shimano were making things less compatible they decided to recess the back of the cassette spider, possibly to make the body a bit shorter and lighter(?). So, when used on any other hub, the 1mm spacer is required so that everything fits together properly. The spacer has nothing to do with the overall width of the cassette, it's to do with the now extinct, non-standard early 10-speed-only alu cassette bodies.

You had a bad day or something, all LBS have done is suggest there may be an issue with earlier wear of 10spd.

You have suggested yourself there may be an issue with a few low quality chainrings - where is your research into this??

sungod

beverick wrote:

...
There was a word of warning regarding the amount of wear with the chainrings. The general feeling (although unproven) was that, as the 10 speed chain is narrower than a 9 speed, it may jump or otherwise play up earlier than a 9 speed as either the chain stretches or the cogs lose their profile.
...

the shimano chainrings are slightly different for 10-speed, but in practice the difference is so small that it is negligible

the likeliest thing you'll experience with a 9-speed chain on 10-speed chainset is that on the smaller ring you may get some slight rubbing of the outside of chain against the big ring when on smaller cogs

i've got a 105 10-speed chainset on a 9-speed bike, the effect is very minor, nothing to worry about

the cassette is another matter, the difference 9 vs. 10-speed is significant, sheldon brown has a page with measurements for various makers/sizes...

http://sheldonbrown.com/speeds.html

salsarider79

It's fair enough to mention about the possible wear to the front rings. Same as the cassette will wear out, and the chain will wear out, the front rings may also wear out. As a rule you can get three chain/cassettes to one set of front rings. If you change a worn out chain you should change the cassette at the same time. When you've done that three times, replace the front rings too.

If the shop hasn't seen the bike, then they should say, you may need to replace the front rings as they may be worn and the chain will not sit correctly, resulting in the chain skipping, not shifting correctly, etc.