Mechanics and Fixing Any Questions Answered

You can but the shifting will be far from optimal due to the different spacing, between sprockets.

Your original pads look like they've still got a bit of life left in them - can you fit them back on and adjust the cable to bring them closer to the rim?

When you do need to replace the pads, I don't think the new ones you've got there will work - they are for a newer design of caliper arm which is perpendicular to the rim, so their threaded part can just sit at 90° straight through the caliper. Check with your local bike shop who can determine the exact type needed! Good luck.

No advice on replacing the pads I’m afraid, but you’ll improve the current performance a lot by giving the rim and pads a good scrub with a clean cloth and water, or ideally pink Muc Off. As said above, the pads still have lots of meat on them, so you might’ve built up grit or contamination on one of the braking surfaces.

For modernish Campagnolo is there a major difference between Power-torque and Ultra-torque bottom bracket cups?

I know the Power-torque cups have the NDS bearing already pressed into the cup. But apart from that they look identical.

Thank you, will make sure to give them a good clean before fitting them back on.

@si_mon628 - thanks! I'll put them back on for now and adjust the cable, then try and find the correct pads for when I do need to change them.

Thank you both for your help!

Just building up a spare parts bin build with a mix of sram MTB shifters, sram rear mech and shimano front mech. I know it worked in the past with my old XT mech but this one is a tiagra. The rear is fine and I’ve got the limit screws set for the big and little rings however I can get it to shift into the middle rings. Too much tension?

Not tension. Something else.

The rear is fine and I’ve got the limit screws set for the big and little rings however I can get it to shift into the middle rings. Too much tension?

In the front or rear?

Sorry. Should have been ring (singular). Middle ring of front triple.

Triples are pretty fussy about the shape of the mech cage, so you're unlikely to get good results using a completely different mech.

Especially if you're trying to use a double-specific mech on a triple.

It's a tiagra mech with a tiagra crank; all the sram is for is the shifter

Supposing that the combination of parts is compatible (I’m sure there’s a chart somewhere but I don’t know off the top of my head), how’s the cage angle looking? The height? Is the problem shifting in both directions to the middle or in one direction?

In theory they're compatible. As I said, the XT mech I had was fine with a SRAM shifter but maybe there's a difference here...

Apparently this specific generation is a bit funny with non-Shimano shifters. Balls. Oh well, parts-bin build is an entirely new drivetrain then :/

Have a lot of customers quickly wearing out the 10t on 12 speed cassettes. Seems a shame to throw away an entire cassette for 1 sprocket.

I know in the past Miche used to offer single sprockets. Anyone else doing similar at the minute?

. Bad joke.

Spoken to a few other mechanics about this today too and seems to be an even bigger problem in the ebike rental market. Cassettes are just getting destroyed on a regular basis.

How hard could it be to fill this little niche with a little reverse engineering and machining.

Not only e-bike rental, we service plenty of e-bikes with the same issue, non cyclists just don't use gears and plod along pedaling slowly with full assistance.

Can i fit a 73mm chainset into a 68mm shell using the spacers supplied with the bb (hollowtech)?

A 73mm chain set or a 73mm bottom bracket?

If the latter, I don’t think so. If the former, if the rings don’t hit the chainstay you can possibly make it work. Not sure if it will impact BB bearing life.

68mm bb shell. 73mm chain set.

Is it as simple as adding spacers to the bb?*
Thanks

*guessing not

Can i fit a 73mm chainset into a 68mm shell

It was the ‘into’ that threw me.

Found this. Seems like it’s readily doable (-for a 1x crank at least), exactly how isn’t very clear.

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Hollowtech stuff like that is 68/73, for a 68mm shell you use 5mm of spacers DS and 2.5mm NDS (used to all be 2.5mm spacers but one of those is split into a really thin one and a less thin one now). That effectively makes it a 73mm shell and the crankset is for both.

@eseman thanks

@snottyotter excellent cheers

Roughly how much would it cost to get one side of a bottom bracket retapped?

I bought a bike on eBay described as “just needs new chainrings” and someone has installed the bottom bracket with mole grips.
Presumably because they needed an extra bit of torque to completely bugger the threads.
The seller seems open to a partial refund

I’ve removed it but the threads look dodgy.

I’m taking the seized seatpost, the underestimated rust and the knackered jockey wheels as part of the fun of buying 2nd hand bikes but the seller must have known about the BB ( and the worn out rim).

Cheers
Dibs

#fuck1x

I know Rose Bikes were doing single Shimano rings from cassettes. It's how I built my custom 11spd10spd cassette.