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• #1202
No one? I applied a bit of GT85 yesterday (run out of WD40) and left it overnight. That and my good friend Mr Leverage who helped thanks to using a socket wrench extender and it's out.
BB is an RPM BB-7420 model. It's too rusty to see the size marked on it but my tape measure confirms BB shell is 68mm and axle width is 103 mm
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• #1203
I need advice.
I have a 54cm Pre-Cursa, 170mm Andel fluted cranks, Un55 105mm BB and rear Quando hub (Varno build).
Will it give me a useable chainline (OR, how do I find out how to calculate it before fitting it all and hoping for the best)?
First bike build for 10 years so I have forgotten everything.
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• #1205
Balls. They are, yes.
Is chainline being out by 2.5mm gonna be a big problem?
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• #1206
Probably fine, but a un55 in 110mm isn't going to set you back much so personally I'd get it right and not have to worry about bursting in to flames or being beset by a plague of skidding locusts (or whatever happens when chainline is out by too much).
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• #1207
Just double checked, it’s 107mm. At 1.5mm I’m gonna risk it! 😮
Cheers for your help! -
• #1208
Hmm. Might not be the right place to post, but anyway. Chorus chainset (drive-side only) keeps working loose and I have to re-tighten the bolt after a couple of long-ish rides. Any ideas about where the problem might be? Have been riding this for over 18 months and has been fine, trouble started (I think) when I replace the outer ring as it was pretty worn out. Pics for context of the set up. Thanks in advance...
3 Attachments
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• #1209
I had the same problem ages ago, what I did was-
Got 18" breaking bar with a 8mm hex driver in and tightened it up as tight as possible by hand, then put the pedal at 9 and the bar at 3 and then stood on both. I never had any reason to remove them before I sold the bike and they didn't come undone in the year after I did this. -
• #1210
Ah, right, cheers. Have a breaker and a big 1/2" drive socket with that hex. Was a bit nervous about overdoing things as I'm a right lump, but I'll give this a go.
Might be over to the 'Uve bin Indra'd' thread later. -
• #1211
So I can't get a decent chainline for love not money on my track bike. In comparison to other cranksets I've got it seems this one (Sugino messenger I believe) is quite offset? Is it just me?
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• #1212
Don’t worry Indra is live and well
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• #1213
What axle length should I look for in a bottom bracket meant to accomodate a crankset with two chain rings? It's a Campag Veloce or Chorus (don't remember which and the branding has worn off) crankset if that helps...
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• #1214
Wondering if anyone can help me with a BB query. I’m currently running a praxis t47 bb and m30 cranks installed. If I were to remove these cranks and install a regular bsa bottom bracket for some shimano cranks would the bb shell threading accept the new bb? Or is it a unique t47 thread?
I’m aware of shims you can get for the t47 to accept a 24mm shimano crank, but I want the t47 and 30m cranks together on another bike.
Thanks in advance
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• #1215
Hi can any one help me what type of BB tool I'll need to get this BB out so I can give it a service. Thanks
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• #1216
Anyone know what the chainline measurements are for either side of the middle/outer spider on a hollowtech 2 mtb crankset are?
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• #1217
Can anyone tell me if an mtb direct mount chainring would work on a set of direct mount road cranks?
I currently have a 36t Absolute black chainring on my Sram X1 cranks, Im building up a cx bike and was going to use a sram force chainset, will I be able to use the AB chainring on the force cranks? -
• #1218
Posted in main forum...
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• #1219
I bought a set of Dura Ace 7700 cranks off eBay and they came with a DA Octalink BB which doesn't fit my frame as ITA vs BSA. Anyway the BSA BB is 109.5mm and the only ITA verison I can find in the same length is £97.
SJS Cycles has a 113mm for £7.99. Should be fine right?
Running DA 7800 mechs and DA7900 DT Shifters.
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• #1220
I'm trying to run a new veloce 10 speed front mech with oldish 10 speed Chorus setup, but can't get the front mech to shift up to the big ring. The chainrings are TA (vento) I think -I'm trying top run a 39/50 combo. Any ideas what the problem might be, or if there is a compatibility issue anyone?
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• #1221
It should work, there isn’t a significant change in derailleur geometry. Is there enough cable tension and are the limit screws set correctly?
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• #1222
Anyone know what tool I need to get this off? I’ve already managed to remove the outer ring using my lock ring tool, but this thing needs a specific tool.
Also, any idea which way it will need to turn to get it out? The outer ring came off anti-clockwise.
Cheers!
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• #1223
Sorted it. Hammer and screw driver :)
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• #1224
I need to change the otp crankset that came with a pompino to a chainring with 26t.
- Where do I get this smol chainring from? @citygent kindly advised nicking the little ring off a deore or I see wiggle has something 26t for a tenner
- Can someone advise on appropriate cranks, if separate? Cheap as chips, if possible
- Where do I get this smol chainring from? @citygent kindly advised nicking the little ring off a deore or I see wiggle has something 26t for a tenner
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• #1225
Could I get an Id on what type of bottom bracket Ill need for this frame please?
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hi, new to the forum although been riding a long time. I have been riding this Langster since Feb this year and it's time to replace the BB.
I'm struggling to remove it at the moment but using a tape measure it appears to be 68/103
Can anyone confirm if this is correct and if so any recommended BB?
Also if anyone knows which year model the Langster is that would be good too.
https://www.instagram.com/p/BxWxj7ZhxOs/