I want to convert my Trek 930, yr 99 from a 8 spd to a 9 spd. Currently it has the Shimano LX shifter, derailers, and LX Delore cranks and rings. I know the rear cassette, chain, and shifter needs to be replaced. Can I still use the LX Delor cranks and rings?

Chris

I purchased a 98 trek 930 a couple of months ago (thought it was a '99, but when the person showed up with it, it turned out to be a '98). Still a good bike, but where the '99 has a Shimano LX drive chain (except the frt der.) and trigger shifters, the '98 has SRAM 7.0 drive chain (except the frt der.), Sugino cranks and grip shifters--the SRAM is supposed to be comparable to the LX group but I am not sure about that. There were a couple of other minor updates between the '98 & '99. Anyway, but I digress.

I took my bike to the LBS to be checked out. While they have some more life in them, the LBS indicated that I will need to replace the cassette & rear der. in the not too distant future. I asked about going with a 9-spd shifter/cassette/der. & was told that I could use the same set of cranks & rings. That will be another upgrade ;-)

Good luck with it.

I want to convert my Trek 930, yr 99 from a 8 spd to a 9 spd. Currently it has the Shimano LX shifter, derailers, and LX Delore cranks and rings. I know the rear cassette, chain, and shifter needs to be replaced. Can I still use the LX Delor cranks and rings?

Chris

yes. actually you can keep using your front and rear derailleurs as well (assuming they are designed for 8 speed). the only things you need to switch out are shifters, cassette and chain. a sram chain is a bit better at this kind of 8/9 speed mix&match because they are a bit wider than shimano 9 speed chains.

930 is a great frame. enjoy.

yes. actually you can keep using your front and rear derailleurs as well (assuming they are designed for 8 speed). the only things you need to switch out are shifters, cassette and chain. a sram chain is a bit better at this kind of 8/9 speed mix&match because they are a bit wider than shimano 9 speed chains.

930 is a great frame. enjoy.

Interesting. I gather from your comment that the der. has no impact on the # of gears--its all about how much the shifter moves the der., and the width of the chain/gears.

Thanks for the feedback on the 930. Not sure how much it weighs, but it seems lighter than most other steel bikes I have picked up.

The derailleur has basicly the same, besides a small change in the cage width and it will work just fine. Check out this short article from Mountain Bike Magazine regarding drivetrain compatibility.

http://205.147.231.78/mbhelp/maintenance/drivetrain/0901_shimano.shtml

On my '96 Scott winterbike I'm running '96 XT 8-speed derailleurs (front/rear) with XTR 9-speed STI grips, XT 9-speed cassette and SRAM PC-99 chain. I'm still using the old Sugino 8-speed chain rings and it's running problem free...

Enjoy!

I agree with all below, but I would really be sure the chainrings are not heavily worn. If they are, matching it up to a new chain and cassette would be sure to cause accelerated wear. It might be cheaper in the long run to just start with a completely new drivetrain. There are some good low prices out there on items like Shimano LX 9 spd cranksets. Check out comparisonpricing.com for good deals.