Upgrading Shifters on 2006 Trek 3700
bmschedler
Posts: 6
I was looking at upgrading my brakes and shifters to SRAM X7 series on my old Trek 2006 3700 Mountain Bike. Although I am unsure as to how the compatability with different speeds of bikes are. I know my bike is only a 7-speed, but is there any way I can have a 9-speed trigger on there without causing problems? I would like to have nicer parts on my bike and maybe eventually transfer them over to a new bike I will be building. What is the best option. I have already ordered the Avid Single Digit Brakes and Speed Dial 7 levers.
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Comments
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You would very likely need a new rear wheel to fit a nine speed cassette - so would need to budget for that.0
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So having the 9-Speed shifter on there isn't at all compatible with the 7-speed gears?0
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No, the shifter has to match the cassette for speeds.0
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You can use an 8 speed shifter with 7 gears as as they have the same gear spacing, you just set the rear mech up to not overshift.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
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Th spacing is still a little different - centre to centre spacing on Shimano cogs is 0.2mm smaller per cog on 8 speed than 9. It can usually be got to work ok though, though may be some clicking if optimised for one end.0
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So does anything else have to match up to make the shifters compatible if I use an 8/7 speed shifter?0
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The rear mech will be fine if you stick to the same brand ie Shimano or Sram, the front mech will be ok anyway.
But I don't really see the point to be honest. I'd stick with what you have if it is working ok, you won't notice much difference with what is available with 8 speed.0 -
The screw is stripped on my gear shifters and the cables aren't able to secure in.0
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For now I'd get some more 7 speed shifters - what rear derailer do you have?0
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Shimano Acera. Could you recommend any? And will the Speed Dial 7 Levers work with whatever you suggest?0
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