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  1. #1
    Der Irregular Biker ThePizzaBandit's Avatar
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    converting SS hardrock disc brakes to fixed commuter

    I have been riding a little over a year. I am not a complete newbie, but certainly not an expert yet.

    anyway...

    I only have one bike. It's a 2005 Specialized Hardrock Singlespeed with disc brakes. I got it cause i didn't have enough experience to build my own, i didn't own anything previously, and it felt good. now i want to convert it for a fixed/free commuter bike. i would remove the disc brake in the back and buy a different hub and wheelset. Any recommendations for a good hub and wheels? I will be putting a rack on the bike. The wheels I have currently are 2.2". I am thinking of switching to 1.85. Will I need to buy different rims (I use Sunrims DitchWitch). I don't really want to spend more than 150 or $200 bucks since I could probably just buy an old frame and convert it for that price.

    Or, am I stupid? Should I just buy a new bike (like the Redline 925?)

    Thanks!

  2. #2
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    The Eno hub is by far the best option for you and it will cost more then $200 by the time your finished. Selling the hardrock as an mtb and getting an old road bike to convert with the money is probably a better option or getting a dedicated commuter like the 925 ir that dawes that was posted last week.

  3. #3
    Der Irregular Biker ThePizzaBandit's Avatar
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    Thanks for the feedback. Is there a cheaper but still good hub? I'm not intending on selling my hardrock. It actually has trackends already, so I don't think I need the eno as I understand that's for people that do not have horizontal dropouts. Am I correct on this?

    I like that it's already got mounts for a rack. Any wheel recommendations as well?

  4. #4
    crotchety young dude el twe's Avatar
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    Oh, if it has trackends, get a Formula/Surly/any track hub and do it.
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

  5. #5
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    yeah, I still contend that it will be more cost effective to keep your old wheel on hand and build a new one from scratch. Also consider if you really want a ss commuter with 4" of travel. remember when you only have one gear you have no choice but to force your way up hills and thats alot easier without a pogo stick beneath you.

  6. #6
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    not stupid but...

    A mountain bike fixed is not a really great commuter. Grt a road bike for your commute. The hardrock SS-keep it for the trails as is. If you really want to convert it though. Just get a new rear wheel with a flip-flop hub. You will want to put some slick tires on it. You will then want to change your gearing. something like 42x18 or 16 to start out with. So,add up all the bits= get a road bike, or the redline monocog 29er with some slicks would be pretty cool(it's doesn;t come fixed though)
    Just my 2 cents

  7. #7
    o.O Seggybop's Avatar
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    You don't need to buy any new parts at all. You already have all the components you need. The only catch is that you'll have to ditch use of your rear brake (which the fixed gear will replace anyway) and you need access to a drill press or someone else who can drill for you.

    All you have to do is take off your SS cog, and using the disc brake rotor as a pattern, drill 3-6 holes into the cog. Bolt the cog to the rear wheel in place of the brake rotor, and flip the wheel around. Now you have a fixed gear wheel about a hundred times more bombproof than any track type fixed-specific hub that might be recommended to you.

    And for the record, fixed MTBs are fine for commuting.
    mi yu mi yu

  8. #8
    Senior Member eddiebrannan's Avatar
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    you actually have a good bit of lateral movement available to you within which the disc brakes will work. the way disc pads engage with rotors is not as specific as brake pads to rims. certainly there will be sufficient fore and aft leeway to permit you to find the sweet spot with regards to chain length and retain rear brake functionality. after all that's precisely what the bike was designed for, which is why it has trackends rather than a regular dropout—fixed vs ss doesn't change anything in that regard

  9. #9
    Der Irregular Biker ThePizzaBandit's Avatar
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    thanks for the info. i'm still not decided totally yet, but at least i know the options.

    by the way, what if i want to do a flip/flop hub. any cheap recommendations? what wheels should i get?

  10. #10
    jack of one or two trades Aeroplane's Avatar
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    Quote Originally Posted by ThePizzaBandit
    by the way, what if i want to do a flip/flop hub. any cheap recommendations? what wheels should i get?
    I vote for flipping your existing SS wheel and bolting on the cog, but if you must get a new wheel, on-one.co.uk sells some 135mm fixed hubs, and I think IRO does too.

    But for your money, I'd say you're better off getting a cheap rigid fork and slick tires (both make commuting a LOT easier) than a new wheel.
    Quote Originally Posted by Dr Irwin Goldstein
    Men should never ride bicycles. Riding should be banned and outlawed. It is
    the most irrational form of exercise I could ever bring to discussion.

  11. #11
    explody pup
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    Apparently Kogswell is going to start producing a bolt-on cog. At least that's what I gather from the blog. And if his earlier prices are any indication, it should be very reasonably priced. You could try emailing or calling him to see what the timeline is for their release.

    It might take some fiddling, but you might be able to get equivalent chainlines for both sides of your current hub if you go this route. Is your hardrock disc-specific or does it have canti/v-brake bosses?

  12. #12
    Der Irregular Biker ThePizzaBandit's Avatar
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    yeah my bike has v-brake bosses as well. i checked out kogswell's site. he has a nice fixed/free hub for $50 but it's for 120mm. am i correct that this is too small for my specialized hardrock?

  13. #13
    o.O Seggybop's Avatar
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    You can switch out the axle and then it will fit.
    Seriously though, there's no need for you to get that. You already have a flipflop hub.
    mi yu mi yu

  14. #14
    Der Irregular Biker ThePizzaBandit's Avatar
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    got it.

    anyway...started whetting my appetite. i saw a Redline 925 that i liked and might just have to add a bike to my collection.

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