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Old 05-26-08, 12:22 AM   #1
Mondoman
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Am I wrong about what chain to use?

I'm hoping to use as many parts already on hand as possible in building a new lower-end MTB; cost is an issue here. Do I have the drivetrain figured out correctly?

I have on hand:
  • Mavic Crossland rear wheel (8-9 speed freehub) w/4.5mm spacer + 7-speed Shimano 13-30 cassette.
  • Shimano Deore LX RD-M581-SGS Rear Derailleur (8-9 speed compatible)
  • SRAM X0 Front Derailleur (44/32/22T 9 Speed compatible)
  • Shimano HG-70 6/7/8-speed chain
  • SRAM HST 7-speed grip shifters

I am planning to buy:
  • Shimano FC-M443 Crankset w/Bottom Bracket (9-speed chain compatible)

I'm happy with the 7-speed cassette for now. From what I've read here and elsewhere, the front derailer and chainrings may have minor spacing width issues with a 6/7/8-speed chain, so I should plan on buying a 9-speed chain instead and not use my current chain, right? Also, if there's a better crankset/BB for the same or lower price, please feel free to make suggestions.
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Old 05-26-08, 12:38 AM   #2
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I think you may be ok with that chain on that setup you have. Try it and see if there is a problem. If you do need another chain then buy it. Good luck.

Last edited by Deanster04; 05-26-08 at 12:42 AM.
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Old 05-26-08, 12:47 AM   #3
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I would tend to go with the 9-speed chain because of the FD issue. You will get more chain/cage rub than is desirable when your chain is too wide (happened to me). A 9-speed SRAM chain can be had for $20-$30.
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