[eyco]

if anyone wonder if a 40T/42T sprocket can work on a 9spd system..
it does! just need a little work but it works great!
have a look how i did it.

Mountain biking blog

 

[Bordershy]

What shifter are you using on that 10sp derailleur?

 

[uzurpator]

Hint:

You can disassemble some 8 speed cassettes - such as CS-HG31-8, replace all spacers with those from 9 speed cassette, add 40T cog and get a "native" 9 speed 11-40 cassette.

11-32 8 speed with replaced spacers + one-up cog has 11-13-15-17-21-24-28-32-40 spacing and no breaks in the range. It works awesome.

CS-HG41-8 also works fine.

 

[eyco]

What shifter are you using on that 10sp derailleur?

im using sram x7 9spd shifter. sram shifters works perfact with the zee derailleur.

 

[the-one1]

More details please. Is there a reason you're using a Zee derailleur? Can you post a close up pic of the cassette?

 

[eyco]

More details please. Is there a reason you're using a Zee derailleur? Can you post a close up pic of the cassette?

no specific reason, just like the zee! great derailleur.

 

[Stonebreaker]

Any mods necessary to use a SRAM 9 speed shifter with a ZEE 10 speed derailleur?

 

[eyco]

just plug and play, im using x7 works great.

 

[Fix the Spade]

Any mods necessary to use a SRAM 9 speed shifter with a ZEE 10 speed derailleur?

No, SRAM 9 speed shifters and Shimano 10 speed mechs use the same cable pull ratio, so they work together.

I don't think either of them planned ahead for that...

 

[fishwrinkle]

looks good, but that 5 tooth jump in the middle of your cassette doesn't bother you? it'd drive me nuts. also, what ring are you running, looks like maybe a 30t?

 

[eyco]

i rarely noticed it. sometimes in low speed maybe.
try fine tune it a little, tension or Release the cable adjuster knob.
i run 32T up front.

 

[Bordershy]

A 20T cog would make it almost perfect. I may never go 10sp if this works out.

 

[CarolinaPanthers]

Great work, eyco! I've been wondering this myself but I never actually tried to test anything. I suppose losing the 18t was the best compromise, could you choose to lose the 16t or would that not be doable/it would be more beneficial to keep that cog?

 

[eyco]

yes when i disassemble the cassette i had to chose between the 16 to the 18, i keep'd the 16 eventually cause i figured it will be more beneficial for speed or cadence then the 18.

 

[Dictatorsaurus]

The concern is the HG-61 could gouge Al freehubs.

Cool solution though. I might try it myself.

 

[DWDW]

Awesome work! Thanks for sharing

I might have to try this as well. I have most of the parts, and wasn't stoked about switching to 10 speed.

Was it difficult to remove the pins? Do you have any tips to share for doing this?

 

[eyco]

glad it was helpful.. im also dont see the point of 10spd, 9spd is more then Enough.

the pins got out very easily, i knock them out using a hammer and a nail, but anything similar can work.
after you build the cassette the pins will be a little longer now, so i grind them a little and left just a tiny bit, then i hammer the top of the pin's to close them good.

 

[DWDW]

Thanks again...the hammer is my favourite bike tool. I think I will give it a shot.

 

[dustyduke22]

This is great news. Of course I just purchased a full 10 speed drivetrain in order to go 1x. Good thing I still have all my 9sp stuff stuff for a backup bike

 

[Bordershy]

This IS a great thing, but don't overlook the elephant in the room. $90-100 is a lot for one cog.