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Post by Bareheg on Jul 8, 2015 20:36:40 GMT
Hi all, I had some problems adjusting the fd in my triban but after starting from scratch a few times I managed to get the shifting correctly. When tha chain is in the largest chainring the outer plate of the fd is about 3mm from the chain.
In action everything works great except when I'm in the smallest 2 or 3 cogs in the back with the largest chainring in the front and I'm pushing hard. I notice a rubbing sound. It took me a while to figure out the problem but I narrowed it down to the bottom part of the right pedal stroke; when I press hard there, the noise noise happens.
Now I've been reading on the internet and the problem seems to be that the frame is bending slightly. Is normal in the t3 or is there anything that needs tightening or aligning (there is no play when I wiggle the pedals in or out). I don't really know how much it's bending but the obvious solution seems to be leaving more space between the fd outer plate and the chain. This would be easy to do except the chainline is quite large in this bike (more than 50mm I think) so adjusting the (stock) fd is a pain as the reach is not enough. I might be wrong but I think the chainline problem affects all the t3 red versions which supposedly was corrected in the white one.
I can maybe increase cable tension to force the fd to swing enough for the rub to stop but this causes the click from the largest chainring to the middle one to be very hard to press (this is how it was when I got the bike second hand).
So what's the recommendation? I tried tweaking the alignment of the fd plane with the chainring plane in order to allow the shifting to work without excessive cable tension but do you think this could be causing the rubbing when the frame bends?
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Post by Radchenister on Jul 8, 2015 21:01:01 GMT
The T3 frame is more solid than most of the bikes I've ever ridden ... and recently I've ridden quite a few different types to compare contemporary frames to ones of old. ... so it's clear to me it's not the frame, it could be the BB, the crank if you're hefty, or it could just be the adjustment of the mech - if it's not the mech setting, then perhaps consider buying a new stiffer square taper BB (at Halfords etc for about a tenner) or perhaps a Sora crank with Hallowtech BB? PS - You're down as a guest and not registered, so I've given you the benefit of the doubt when answering but answered a little hastily, as we've done this issue to death if you take the time to look around. It's possible that you might be a troll of course, so a polite warning, if you are a troll, the ejector button is so much fun to use that there's no hesitation needed to boot you and your current IP for good !
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Post by davidgarside on Jul 9, 2015 10:18:02 GMT
I found the BB completely void of grease on my 500SE. This caused a clicking noise, different from yours but worth checking, even for the peace of mind, knowing it's lubed ok. Good luck.
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Post by Deleted on Jul 9, 2015 10:22:09 GMT
Way more expensive bikes will see the chain rubbing the front derailleur under load. I wouldn't worry too much about it. The T3 is a solid bike but put enough power through it and things will move around.
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Post by Radchenister on Jul 9, 2015 11:18:14 GMT
Total BS, why a waif of a rider keeps talking power is beyond me!
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Post by Deleted on Jul 9, 2015 11:25:56 GMT
Total BS, why a waif of a rider keeps talking power is beyond me! Easy on. I'm not saying I've experienced it on my bike. Simply saying it can happen. You can't just tar other peoples opinions as BS when they don't match your own. I don't think you'd be too long issuing a ban to someone who responsed to your posts as 'BS'.
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Post by Radchenister on Jul 9, 2015 11:36:48 GMT
By way of actual facts to demonstrate my view (there are more than one instance I can show but this one is particularly pertinent) - this was done on the T3, with Hallowtech BB, Sora cranks and Aksiums. This is an uphill sprint after a flat run in, needs a serious out the saddle power push from the bottom to the top of the rise, which is the segment the T3 gets right up there with all the top local racer boys. I reckon Strava is probably even underestimating the load, as I was about a stone heavier at the time ... so to get your heads around this, that's about 15 stone 6 lbs of rider on a 9.5 kilo bike, paced against all sorts of lighter and more expensive riders and bikes, it wouldn't be possible to equal and beat them if it wasn't stable under load whilst putting a constant high wattage through the frame, some flex is there in most frames but there's no way you can class the T3 as low on the stiffness scale ... www.strava.com/segments/3325598
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Post by Radchenister on Jul 9, 2015 11:40:38 GMT
... and lighten up, it was a p' take comment, followed up by the more serious one explaining the viewpoint above ... you're a long term member who's supposed to be in on the craic, the bans get dished out to newbies!
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Post by Deleted on Jul 9, 2015 11:42:08 GMT
A review of the Triban 520 where the reviewer refers to getting derailleur rub through the bottom bracket area under strong load. These reviewers and their total BS. road.cc/content/review/156193-btwin-triban-520''The bike's not as stiff as a carbon race frame, and you can eke out some derailleur rub in the bottom bracket area if you put the hammer down, but it's well within the acceptable range.''
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Post by Deleted on Jul 9, 2015 11:44:35 GMT
By way of actual facts to demonstrate my view (there are more than one instance I can show but this one is particularly pertinent) - this was done on the T3, with Hallowtech BB and Sora cranks and Aksiums. This is an uphill sprint after a flat run in, needs a serious out the saddle power push from the bottom to the top of the rise, which is the segment the T3 gets right up there with all the top local racer boys. I reckon Strava is probably even underestimating the load, as I was about a stone heavier at the time ... so to get your heads around this, that's about 15 stone 6 lbs of rider on a 9.5 kilo bike, paced against all sorts of lighter and more expensive riders and bikes, it wouldn't be possible to equal and beat them if it wasn't stable under load whilst putting a constant high wattage through the frame, some flex is there in most frames but there's no way you can class the T3 as low on the stiffness scale ... www.strava.com/segments/3325598Nobody has said the T3 is unstable under load or even low on the stiffness scale. It is a tank of a bike but to say it's BS to suggest that some riders can have it flexing to the point where a bit of chain rub occurs is utter nonsense.
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Post by Radchenister on Jul 9, 2015 11:44:44 GMT
... but is it the crank or the BB or the frame - they couldn't possibly tell and it's more likely the BB and crank than the frame.
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Post by Radchenister on Jul 9, 2015 11:47:51 GMT
... or a wonky chainset (mine has this at the mo with original Ounce, it irritates me when looking at it on the turbo), or just badly set up gears. This thread is obviously a troll thread and has exactly that feel about it - I wonder who the OP is, as they're obviously after a wind up !?
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Post by Deleted on Jul 9, 2015 11:48:05 GMT
... but is it the crank or the BB or the frame - they couldn't possibly tell and it's more likely the BB and crank than the frame. He compares it to a carbon frame so we can only assume it's a comparison to the frame. Either way the symptoms OP mentions could be as a result of some mild flex in the setup (whether it be the frame, bb, cranks or derailleur itself).
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Post by Radchenister on Jul 9, 2015 11:53:30 GMT
Exactly, but it's a troll post, no-one comes on a forum with that sort of comment, jumping straight in without introducing themselves and registering ... this thread is just a big joke. The OP is on the one hand knowledgeable and on the other after basic advice that they probably already know the answer to, whilst dissing out a well known 'cat among the pigeons' issue with all bikes, classic signs of trolling.
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Post by Deleted on Jul 9, 2015 11:55:31 GMT
Seems a lot of effort to troll. Not uncommon for someone to use the guest facility for a quick bit of advice. We shall see if he responds.
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