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Johnny Napalm
Joined: 08 Aug 2007
Posts: 579
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 Posted Fri Nov 6, 2009 1:19 pm |
Hello.
I have two of these bikes (almost), and my mate is wanting one to maybe covert to a singlespeed.
I still have the frame, crankset, pedals, wheels, handlebars, brakes but no front or rear mechs, or shifters. I understand that you can buy the conversion kits (DMR etc.), but would he need to buy a new crankset?
If he purchases the 16T DMR kit, I understand that he will need something like a 32T chainweel up front?
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Rocky Ridge
Cape Wrath SS |
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nicklouseLives Here
Joined: 20 Mar 2003
Posts: 48121
Location: A Yorkshire man in Sweden
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bomberesque
Joined: 18 Jul 2008
Posts: 1127
Location: Belgium, where rain is typical
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Posted Fri Nov 6, 2009 2:02 pm |
what's the middle ring at the moment?
Even if they're not removable (and squinting at the photo it looks like they are) there's nothing to stop you leaving the rings on there and just using the middle one (they're often 32, but if it's 34 than just tell you mate to MTFU, it'll put hairs on his chest to run slightly higher gearing.) The only thing might be if the chain catches on the big ring shifting ramps I guess but some judicious mucking around with the spacers that DMR give you with their conversion kit should sort that out. Looks *much* neater with a bashguard instead of the big ring though
and you can use your existing chain, just shorten it. In fact the DMR kit that I bought wasn't compatible with a full width SS chain (1/8"). 3/32 (5-8sp, "BMX racing chain") or (can't remember the width) 9sp chain worked fine though
Everything in moderation ... except beer
Beer in moderation ... is a waste of beer
If riding an XC race bike is like touching the trail,
then riding a rigid singlespeed is like licking it
... or being punched by it, depending on the day |
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Johnny Napalm
Joined: 08 Aug 2007
Posts: 579
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Posted Fri Nov 6, 2009 6:42 pm |
Thanks, guys.
The crankset is an old Truvative 5D and the middle ting is 32T. What's the usual route...remove the small chain-ring?
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Rocky Ridge
Cape Wrath SS |
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snotty badger
Joined: 23 Feb 2008
Posts: 835
Location: North Cumbria
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Posted Fri Nov 6, 2009 7:36 pm |
Yup remove the small and big ring. You'll need some shorter chainring bolts, or carefully file the ones you have down a little.
Trailstar SS |
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bomberesque
Joined: 18 Jul 2008
Posts: 1127
Location: Belgium, where rain is typical
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Posted Sat Nov 7, 2009 5:43 am |
remove the small ring, this doesn't affect the middle/big. You'll need to take the crank off to do this. There's nothing to stop you just leaving it on there, if you don't want the faff / don't have the tools to take the crank off.
For the big ring, the shorter bolts are needed if you remover the big ring leaving only the middle so you have 3 choices there;
1. As badger says; remove the big ring, get shorter bolts or file the ones you have down (or get the right washers, scour your local DIY)
2. Leave the big ring on there
3. Replace the big ring with a 32T sized bash
neatest option is 3 IMO, provides protection while increasing clearance and looks tidy.
Everything in moderation ... except beer
Beer in moderation ... is a waste of beer
If riding an XC race bike is like touching the trail,
then riding a rigid singlespeed is like licking it
... or being punched by it, depending on the day |
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Johnny Napalm
Joined: 08 Aug 2007
Posts: 579
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Posted Sat Nov 7, 2009 7:16 am |
Thanks for the help. We'll have a look this weekend. I do like the idea of just leaving the middle ring and replacing the big ring with a 32T bashguard, as I would imagine that it would be much more tidy.
If the DMR conversion kit with tension seeker was used, would the QR skewer need replacing with a nuttted-type? Or, are qr fine as long as they are tightened securely?
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Rocky Ridge
Cape Wrath SS |
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bomberesque
Joined: 18 Jul 2008
Posts: 1127
Location: Belgium, where rain is typical
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Posted Sat Nov 7, 2009 9:06 am |
QR is fine because your dropout is vertical it can't really pop out (OK, it can, but it really almost certainly won't) On a horizontal drop out, where the axle can slip, a bolt through is one option, but a tugnut also does the job.
Everything in moderation ... except beer
Beer in moderation ... is a waste of beer
If riding an XC race bike is like touching the trail,
then riding a rigid singlespeed is like licking it
... or being punched by it, depending on the day |
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Johnny Napalm
Joined: 08 Aug 2007
Posts: 579
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Posted Sat Nov 7, 2009 12:25 pm |
Phase I complete!
I've taken the inner and outer chainrings off, but I can see what you mean about shorter chainring bolts. I'll see about filing the bolts nuts down/including spacer washers, but if I buy some will I need 'outer ring -narrow'.
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Rocky Ridge
Cape Wrath SS |
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nicklouseLives Here
Joined: 20 Mar 2003
Posts: 48121
Location: A Yorkshire man in Sweden
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Johnny Napalm
Joined: 08 Aug 2007
Posts: 579
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Posted Sat Nov 7, 2009 12:45 pm |
Thanks, Nick.
The ones I have are approx. 10.8mm with the nuts, so I'll look for some shorter ones.
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Rocky Ridge
Cape Wrath SS |
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Johnny Napalm
Joined: 08 Aug 2007
Posts: 579
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nicklouseLives Here
Joined: 20 Mar 2003
Posts: 48121
Location: A Yorkshire man in Sweden
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Johnny Napalm
Joined: 08 Aug 2007
Posts: 579
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Posted Sun Nov 8, 2009 9:06 pm |
Once again...thanks, Nick.
I've ordered myself some shorter single ring bolts, so I can then take off the big 'un!
Cheers
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Rocky Ridge
Cape Wrath SS |
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