8 - 10 speed

khester
khester Posts: 4
edited September 2010 in Workshop
Hello everyone, I am new to this forum. I have looked through the topics to see if my question was answered. But I couldn't find it so I thought i would post and see if someone might be able to give me a hand.

So I tried riding last year and really enjoyed it. I was thinking of maybe doing it a little more seriously this year. I don't have the money to drop on a new bike, but I thought I would at least try and give myself some more power.

Right now I am running an 8 speed cassette on the rear and a 2 speed on the front. The question I have is. Can I replace the 8 speed cassette with a 10 speed without buying new wheels. I know I will have to replace the derailleur, shifters, chain and cable. But I have a buddy that can sell me 10 speed parts. All I need to do is go out and buy a 10 speed cassette, cables and chain. But only if I don't have to buy new wheels.

Thanks in advance,
Kevin

Comments

  • dmch2
    dmch2 Posts: 731
    You don't need to replace the rear wheel or derailleur, just the chain, shifters and obviously the cassette.

    Watch out though as there are two types of hub and cassettes either fit one or the other. Hopefully someone will post some pictures soon as to how you tell them apart. I've only ever used one type...
    2010 Trek 1.5 Road - swissstop green, conti GP4000S
    2004 Marin Muirwoods Hybrid
  • If you've got shimano, no problem. Unfortunatelt Campag 8 speed rear free hubs are different and you need the later hub to run 9, 10 and 11 speed.

    What groupset are you using?
  • dmch2
    dmch2 Posts: 731
    I thought campag were the awkward ones. Didn't realise there were *two* campag types though!
    2010 Trek 1.5 Road - swissstop green, conti GP4000S
    2004 Marin Muirwoods Hybrid
  • Awesome. So what my set consists of:
    Ultegra rear deralleur RD6500
    Ultegra wheels
    Shimano HyperGlide cassette
    Shimano bar end shifters(all they say is M5)
    I am also running ultegra front dérailleur and crankset.

    Now I did remove the cassette to find out that the wheel is a freehub.

    Just a question as to why I don't have to replace the rear dérailleur. They have that much range in them?

    Thanks for all the help.
    Kevin
  • dmch2
    dmch2 Posts: 731
    RDs all have the same amount of travel and the shifters define how many stops they have. A 10 sp cassette has thinner cogs that are closer together than an 8sp but is the same overall size. Hence the need for a thinner chain on a 10sp to fit in the thinner gaps
    2010 Trek 1.5 Road - swissstop green, conti GP4000S
    2004 Marin Muirwoods Hybrid
  • desweller
    desweller Posts: 5,175
    I think that, if you run your shifters in friction mode, because the total range of movement is the same, you can still use them with a 10-speed back block.
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  • sub55
    sub55 Posts: 1,025
    can confirm , if you are running bar end shifters , flick them over to friction and they wont need changing.
    the only thing you`ll need to change ( if using bar end shifters) is the cassette and chain.
    constantly reavalueating the situation and altering the perceived parameters accordingly
  • That is great, thanks so much for the feedback. I am going to get my cassette and chain and give it a try. I will report back after install and set-up.

    Thanks again.
    Kevin
  • satanas
    satanas Posts: 1,303
    Be careful if you decide to get the Shimano 10-speed bar-end shifters - there are two models. The 7900 and 7800 shifters and derailleurs use different cable travel; those with anything other than a Dura-Ace 7900 rear mech will want the 7800 shifters.