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Post by Patrick on Aug 6, 2006 23:49:49 GMT 8
Which one is the best? 1. The usual tensioner like the one/two roller dabomb, surly etc. 2. The push up kind like rennen, DMR, dabomb etc 3. The Rohloff ala rd looking thingie
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Post by >rocketman> on Aug 7, 2006 9:54:49 GMT 8
i think, for me the best looking of all is, without a tensioner, cleaner/simple look,
correct chain length with right amount of tension.
that is if the frame is allows it, bmx style horizontal drop outs,
or use of eccentric bb, and half link chains etc.
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Post by 32by18 on Aug 7, 2006 10:39:43 GMT 8
they all have different approaches in solving chain tension issues, but if you ask me, I'd go for the Rennen. Simple, no springs. Springs can potentionally snap, or lose tension...
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Post by PT on Aug 7, 2006 19:58:49 GMT 8
rohloff! low profile so you still have lots of clearance.ü
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Post by Patrick on Aug 7, 2006 20:04:32 GMT 8
Are those rohloff available here? I saw in Tartybikes thats its 50pounds kaasar. I was thinking of making one ala rohloff nalang with a road RD. ;D
There is a cheaper alternative to Rennen which is a no spring dabomb only Php500.
My question basically hovers around the issue of performance po.
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Post by 32by18 on Aug 7, 2006 22:38:50 GMT 8
compare the rollers/pulleys that they use...the Surly and DaBombs use a toothed pulley, ala derailleur, which has a bit more friction than the urethane roller of the Rennen.
I've used the Da Bomb, and I've also used the Soulcraft Convert. I preferred the Soulcraft. Much smoother.
Hope that helps
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Post by wcoastbo on Aug 8, 2006 0:46:13 GMT 8
i think, for me the best looking of all is, without a tensioner, cleaner/simple look, correct chain length with right amount of tension. that is if the frame is allows it, bmx style horizontal drop outs, or use of eccentric bb, and half link chains etc. I agree! rocketman's approach is the best. If you're converting a non-SS frame find the best possible gear to eliminate the tensioner. I was lucky to have a frame where the dropouts are not truely vertical. There's between 1/16 and 1/8 inch of chain adjustment for me. Between half-links, the right gearing and my DIY dremel made dropout spacers, I was able to go tensionerless. You can also file or grind down your axles a bit to make them eccentric. I recommend that this method be done very carefully so the axles are not ruined. I've also heard of people taking a dremel to their frames... not recommended unless you have an old frame.
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Post by Patrick on Aug 10, 2006 21:10:24 GMT 8
My dropouts are like half of a dropout so dremel is out so with an exact chain length since I want to have a bit of a slack or not.
Are those 2 roller dabomb tensioner similar to the rohloff?
OT : wow this is my 1000th post.
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Post by kumagdude on Aug 11, 2006 8:11:20 GMT 8
mga sirs, why is it my chain always come off from my sprocket even i have tensioners? by the way im using the bomb tensioner like the rennen. thanks
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Post by 'Bee' on Aug 11, 2006 8:40:12 GMT 8
try to check your chainline. make it straight as much as possible.
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Post by kumagdude on Aug 11, 2006 9:18:50 GMT 8
sir bee, how do i check my chainline? and how can i fix it? the large spacer of the sprocket is in the inner side and the thinner one is near the frame? thanks
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Post by 'Bee' on Aug 11, 2006 9:38:01 GMT 8
sir bee, how do i check my chainline? and how can i fix it? the large spacer of the sprocket is in the inner side and the thinner one is near the frame? thanks Just eyeball your chainline from the rear cog, you can see "bends" right after the sprocket and before the chainring. Are you using the 2-pc DaBomb spacers? My buddy's SS rig is using one and I have to put a 1.5mm spacer between the thick spacer and the cog. Still, it's not straight but it's good enough. Or you can also add a spacer on your Bottom Bracket to make your cranks and chainring a bit outboard.
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Post by kumagdude on Aug 11, 2006 9:58:41 GMT 8
thank you sir, what i did is to place the middle chainring outside of the crank, and it work as of now, is that ok?
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Post by 32by18 on Aug 11, 2006 17:24:47 GMT 8
yep, that should work too sure your chain doesn;t have too much slack?
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Post by wcoastbo on Aug 12, 2006 2:43:42 GMT 8
for spacers I've been using many small spacers (3mm thick). I dissembled old XT/ultegra/dura-ace cassettes and salvaged the spacers.
to get my chainline perfect, I install the cog without any spacers. With the bike on a workstand, attach the chain and rotate the cranks backwards. the cog moves towards the perfect chainline vs the chainring. Mark the spot and install spacers.
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Post by kumagdude on Aug 24, 2006 8:46:41 GMT 8
sir why is it my chain always drop or sometimes a loud sound occur when im pedaling?
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Post by 32by18 on Aug 24, 2006 10:29:59 GMT 8
kumagdude - when does the chain drop or make a sound? under hard pedaling? normal pedaling? hitting bumps or jumps? things to look out for: - are you using an old or worn chainring or cog? that may be the cause - try running your chain ON TOP of the tensioner's pulley (push-up mode), so you get more chain-wrap around the cog. You may need to adjust the tensioner's position. - check your chainline as mentioned in a previous post. good luck and hope you sort it out agu hmm maybe it's time we have a SS troubleshooting thread
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Post by kumagdude on Aug 24, 2006 12:45:23 GMT 8
sir, normal pedaling lang po, im using new the bomb cog but lod 9 speed chain
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Post by the D. on Aug 24, 2006 15:16:24 GMT 8
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Post by wcoastbo on Aug 25, 2006 4:37:02 GMT 8
sir why is it my chain always drop or sometimes a loud sound occur when im pedaling? if you've determined that your chainline is straight, then check that you don't have a bent or sticky link in the chain. is the chain dropping of the cog or the chainring? check each tooth to make sure they are straight. also make sure the tensioner is properly aligned with the cog/chainring.
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