Search found 283 matches

by NickJP
22 Oct 2020, 7:24am
Forum: Bikes & Bits – Technical section
Topic: Shimergo - latest news
Replies: 52
Views: 3434

Re: Shimergo - latest news

FWIW I agree that sticking with 3x10s seems a sensible thing to do. Even more sensible for many users would be to ditch the smallest sprocket, use a shorter freehub body so that the wheel can be built with reduced dish etc. 3x9 is more than enough gears for most folk, and if it comes with lighter/s...
by NickJP
22 Oct 2020, 6:58am
Forum: Bikes & Bits – Technical section
Topic: Swap 105 crankset for GRX?
Replies: 16
Views: 452

Re: Swap 105 crankset for GRX?

A GRX crank has its chainline 2.5mm further out than your existing crank - if you hardly ever use use your three or four smallest cogs on the cassette, and are frequently using the large cogs, bringing the chainline in rather than out is what you want. As someone else suggested, Absolute Black sell ...
by NickJP
20 Oct 2020, 10:10pm
Forum: Bikes & Bits – Technical section
Topic: Chain wear indicator/when change?
Replies: 28
Views: 1099

Re: Chain wear indicator/when change?

There are any number of ways of seeing if the chain is knackered or not, but accurate measurements are a different thing; they can potentially allow you to predict when the chain will be due for replacement. Why worry about extreme accuracy? All I do is eyeball the elongation over 12", and whe...
by NickJP
20 Oct 2020, 9:14pm
Forum: Bikes & Bits – Technical section
Topic: Chain wear indicator/when change?
Replies: 28
Views: 1099

Re: Chain wear indicator/when change?

you in the end filed down or some thing the teeth of the digital calipers didnt you to make sure your measurements were accurate and not measuring the wrong curvature? Why bother doing that? Lock the caliper at the 12" setting, butt one of the internal jaws against the end of one of the outer ...
by NickJP
14 Oct 2020, 11:27am
Forum: Bikes & Bits – Technical section
Topic: Sheldon Brown - always has the answer
Replies: 8
Views: 490

Re: Sheldon Brown - always has the answer

They do look to be a neat and simple solution to a problem. Now there is just the matter of getting the mudguard fitting to not rub on the headset. Or is the headset concealed? No problem with clearing the headset: https://lh3.googleusercontent.com/k9eKhMC7Fp__pjF3EzWnmm_KjfkaXQdEir8aaXoShghcO5fG35...
by NickJP
12 Oct 2020, 10:07pm
Forum: Bikes & Bits – Technical section
Topic: Greasing Square taper BB spindle
Replies: 9
Views: 421

Re: Greasing Square taper BB spindle

Around half my bikes have greased tapers and the other half don't, and it makes no damned difference. Toss a coin and let that make the decision for you.
by NickJP
4 Oct 2020, 11:57am
Forum: Bikes & Bits – Technical section
Topic: not broken one of these Shimano BBs before
Replies: 26
Views: 1512

Re: not broken one of these Shimano BBs before

I think that longer crank bolts can help prevent failure of the taper at that point, as the longer bolt means that the bolt thread extends past where the crank pulls onto the tapered axle. Here's a photo of three crank bolts - a Sugino on the left, a Campagnolo on the right, and I don't know the bra...
by NickJP
30 Sep 2020, 4:01am
Forum: Bikes & Bits – Technical section
Topic: Shimano 11-speed derailleurs
Replies: 6
Views: 333

Re: Shimano 11-speed derailleurs

There's also the GRX series RD-RX810 rear derailleur, which has a clutch and is compatible with Shimano 11-speed road shifters. I'm using one with Dura-Ace 11-speed barend shifters. Shimano claim 255g weight: https://bike.shimano.com/en-EU/product/component/grx-11-speed/RD-RX810.html .
by NickJP
29 Sep 2020, 1:25am
Forum: Bikes & Bits – Technical section
Topic: Tubeless not seating - am at wit's end
Replies: 15
Views: 529

Re: Tubeless not seating - am at wit's end

I'm dumping the full 160psi reservoir into it, and it's just going around the tyre and into the air. The tyre barely shifts at all. I suspect that the post from Brucey is closest to explaining the issue. When this happens to me with tubeless tyres, I inflate the tyre using an inner tube, so that bo...
by NickJP
27 Sep 2020, 10:35am
Forum: Bikes & Bits – Technical section
Topic: 5 arm crank with one arm hidden. Why?
Replies: 9
Views: 444

Re: 5 arm crank with one arm hidden. Why?

Is there a reason for 5 arms with one hidden? Apart from "aesthetics"? It pretty much does away with crank failure due to cracking where the trailing spider arm joins the crankarm at an acute angle, as this angle between the two means only a thin web of metal at that point. I can remember...
by NickJP
21 Sep 2020, 5:45pm
Forum: Bikes & Bits – Technical section
Topic: Broken chain
Replies: 11
Views: 593

Re: Broken chain

Andre Darrigade was sometimes called the "Breaker of chains", due to the chains of the day occasionally breaking under him - decades before the moniker was used for a Game of Thrones episode.
by NickJP
19 Sep 2020, 5:38am
Forum: Bikes & Bits – Technical section
Topic: Cork handlebar tape
Replies: 4
Views: 305

Re: Cork handlebar tape

I've used the Cinelli cork tape on multiple bikes. Easy to wrap, stays in place, quite good shock absorption, lasts well.
by NickJP
19 Sep 2020, 3:22am
Forum: Bikes & Bits – Technical section
Topic: UN55 BBs not so good anymore?
Replies: 62
Views: 2176

Re: UN55 BBs not so good anymore?

Good cup and cone BBs are available NOS. New ones tend to be the lowest grade of BSO rubbish. IRD still sell good quality cup and cone BBs: https://www.interlocracing.com/shop/product/ird-bottom-bracket-tenacity-qb-40-jis-2838?search=bottom+bracket . They are actually more expensive than any of the...
by NickJP
8 Sep 2020, 12:51am
Forum: Bikes & Bits – Technical section
Topic: Stainless Steel frames v other steels
Replies: 40
Views: 1466

Re: Stainless Steel frames v other steels

Here are some Sapim Race stainless steel spokes in a wheel I built about a decade ago that are showing surface corrosion: https://lh3.googleusercontent.com/8AVWTesvDEbiehH0BJn34CfXN6kIlSs7Rr2lcX_18hh5dQFsOerFE5ISizH45KD_MJWMOzaR2JfN-enZ7sxbtML651meBvGjfOt1QQheEf60AdHivz5qcGzyBAzFGek-XT7DpwEpNQ https...