Search found 1824 matches

by rogerzilla
14 Jun 2021, 7:09pm
Forum: Bikes & Bits – Technical section
Topic: Turbo Trainer tyre existence? 27 x 1 1/4
Replies: 2
Views: 54

Re: Turbo Trainer tyre existence? 27 x 1 1/4

It would be like looking for a tyre for a horse.

Just use a cheap smooth tyre and put a lot of air in it.
by rogerzilla
13 Jun 2021, 8:54pm
Forum: Does anyone know … ?
Topic: Internal rim hole damage on new wheels
Replies: 20
Views: 575

Re: Internal rim hole damage on new wheels

I'm the wrong sort of engineer for this sort of thing but even I can see those rims are horrid and only fit for scrap.

I've found Exal rims to be good for the (very low) price. Never seen this sort of a mess with them, so some batches are fine.
by rogerzilla
13 Jun 2021, 4:59pm
Forum: Bikes & Bits – Technical section
Topic: How often should one change one's D lock?
Replies: 21
Views: 644

Re: How often should one change one's D lock?

When people used to go to the office, there was a newish Pinarello in our bike shed secured with one of those cable locks you can (literally) snap by hand.
by rogerzilla
13 Jun 2021, 4:55pm
Forum: Bikes & Bits – Technical section
Topic: 11sp 105 hub issues
Replies: 7
Views: 240

Re: 11sp 105 hub issues

In my personal experience, Shimano stuff below the top grades, while still made of very high quality components, is no longer adjusted properly out of the box. QR hub cones are generally too tight against the bearings but not tight enough against their locknuts.

If a RH cone is not tight against the locknut, it can become REALLY tight against the bearings, which stop turning. Then bad things happen.
by rogerzilla
13 Jun 2021, 12:11pm
Forum: Bikes & Bits – Technical section
Topic: UN 300 vs UN XX sealed BB units
Replies: 19
Views: 668

Re: UN 300 vs UN XX sealed BB units

The TA Axix is a bit fragile. I had one for years, and changed the bearings a couple of times. You really need the proper TA lockring tool to fit it (£££, if you can find one), it has no central sleeve so must just be nipped up, no tighter, and it tends to squeak unless you keep the cups greased where the cartridges bear against them. It's very pretty but not as fit-and-forget as a UN55.
by rogerzilla
12 Jun 2021, 7:52am
Forum: Bikes & Bits – Technical section
Topic: Paint strippers
Replies: 26
Views: 702

Re: Paint stripper's

Nitromors has apparently been reformulated over the years and, as is the way of such things, it's now less hazardous but also less effective.

The Wilko stuff worked tolerably well last year when I was restoring a cast iron vice. I would guess that was also stove enamelled.
by rogerzilla
11 Jun 2021, 9:22am
Forum: Bikes & Bits – Technical section
Topic: UN 300 vs UN XX sealed BB units
Replies: 19
Views: 668

Re: UN 300 vs UN XX sealed BB units

fastpedaller wrote: 10 Jun 2021, 5:13pm
rogerzilla wrote: 10 Jun 2021, 3:49pm replacing the bearings is possible, which makes them a lot better value as a long term prospect.
Only if it's possible to buy the bearings at less cost than a complete unit :)
It is if you buy basic quality ones, which is probably what was in there. Go up to the best quality, and it's about the same as a new BB. Most BBs use 69032RS, which is somewhat expensive compared to other sizes. Best quality 62032RS (a much bigger size, used in Brompton folding pedals) are a fraction of the cost. I assume this is related to popularity in industrial equipment and economies of scale.
by rogerzilla
10 Jun 2021, 3:49pm
Forum: Bikes & Bits – Technical section
Topic: UN 300 vs UN XX sealed BB units
Replies: 19
Views: 668

Re: UN 300 vs UN XX sealed BB units

I've found Tange Seiki BBs to be pretty good. They are the usual "two industrial cartridge bearings and a central sleeve" design, but (a) the sleeve is metal so doesn't squish like the plastic or carbon ones and (b) replacing the bearings is possible, which makes them a lot better value as a long term prospect.
by rogerzilla
10 Jun 2021, 2:49pm
Forum: Bikes & Bits – Technical section
Topic: UN 300 vs UN XX sealed BB units
Replies: 19
Views: 668

Re: UN 300 vs UN XX sealed BB units

zenitb wrote: 10 Jun 2021, 11:19am
rogerzilla wrote: 9 Jun 2021, 11:00am My suspicion is that Shimano would like to kill off square taper on decent bikes. HT2 has been around for many years, and they can't see why you wouldn't use that.
yep...or Octalink...oh wait..;-)
The BikeRadar review of XT HT2 bearings says, without a hint of irony, "– the current versions are now regularly lasting more than six months of hard use."

I assume that's on Danny McCaskill's daily ride :D
by rogerzilla
9 Jun 2021, 3:22pm
Forum: Does anyone know … ?
Topic: SIDI shoes
Replies: 14
Views: 407

Re: SIDI shoes

If it helps, my Sidis are euro size 46 and my normal UK size is 10. So go up one UK size, then convert. I'm assuming the OP is a Christopher, not a Christine, as Sidi women's sizes might not run quite the same.
by rogerzilla
9 Jun 2021, 11:00am
Forum: Bikes & Bits – Technical section
Topic: UN 300 vs UN XX sealed BB units
Replies: 19
Views: 668

Re: UN 300 vs UN XX sealed BB units

My suspicion is that Shimano would like to kill off square taper on decent bikes. HT2 has been around for many years, and they can't see why you wouldn't use that.
by rogerzilla
9 Jun 2021, 10:56am
Forum: Bikes & Bits – Technical section
Topic: Headset Press Disaster
Replies: 36
Views: 1449

Re: Headset Press Disaster

Sounds like a very unlucky clash between tool and headset. I've pressed loads of headsets with the same tool and never had any problems. I think the learning point is to check before applying pressure, and to insert a suitable washer if it looks as if the Cyclus stepped adaptors are close to the ID of the cups (which is non-standardised and depends on the bearing type and the thickness of the metal).
by rogerzilla
5 Jun 2021, 9:03am
Forum: Bikes & Bits – Technical section
Topic: Bell doesn't cut it, decent alternative?
Replies: 42
Views: 1271

Re: Bell doesn't cut it, decent alternative?

If you ring your bell, they glare at you as if to say, "How dare you ring your bell at me?"

If you don't ring your bell, they say, "Where's your bell?"

Everyone hates cyclists.
by rogerzilla
4 Jun 2021, 10:40am
Forum: Bikes & Bits – Technical section
Topic: Inline dynamo connectors
Replies: 10
Views: 245

Re: Inline dynamo connectors

Automotive wiring connectors can be had in all sorts of wire counts and cannot work loose by accident. Not the prettiest, though, as they're all rectangular and a bit chunky.
by rogerzilla
4 Jun 2021, 10:27am
Forum: Bikes & Bits – Technical section
Topic: Tony Oliver Bikes Advice needed
Replies: 15
Views: 561

Re: Tony Oliver Bikes Advice needed

He was certainly keen on 650B for small riders (otherwise the frame geometry becomes horrible) but the book also predates compact frames, which are now near-universal.

I don't know what the first compact touring bike was, but the first compact road bike was claimed to have been the Dave Lloyd Concept 90, produced just about when "Touring Bikes" came out. DL may have got the idea from Brodie MTBs, which is apparently also where Kona got the idea from (they really popularised it).