Search found 2872 matches

by Samuel D
18 Jul 2015, 10:16pm
Forum: Bikes & Bits – Technical section
Topic: Bent derailleur hanger – how to fix?
Replies: 3
Views: 1217

Re: Bent derailleur hanger – how to fix?

Thanks, both. The two-wheel technique is ingenious. Will explore the viability of that tomorrow. A couple of the spokes are indeed visibly gouged, Brucey. The wheel isn’t hugely out of true but enough that I had to flip the brake calliper’s quick-release to get home without brake-rub. I had the impr...
by Samuel D
18 Jul 2015, 9:12pm
Forum: Bikes & Bits – Technical section
Topic: Bent derailleur hanger – how to fix?
Replies: 3
Views: 1217

Bent derailleur hanger – how to fix?

Had a nightmare of a ride today. While stupidly looking around, I drifted into a shallow kerb and slid along it in the time-honoured way until I fell over. The rear derailleur struck the ground first, probably hitting the kerb itself. I don’t know if the derailleur is damaged but its hanger is certa...
by Samuel D
15 Jul 2015, 11:39pm
Forum: Does anyone know … ?
Topic: Electric gear shifting?
Replies: 282
Views: 9377

Re: Electric gear shifting?

Probably overkill as the claimed battery life is around 1000 miles per charge. A meaningless figure that accidentally reveals the technical nous of the target market! Incidentally, I am fussy about my cadence. I change gear maybe five times more often than the typical cyclist I observe on group rid...
by Samuel D
15 Jul 2015, 11:07am
Forum: Does anyone know … ?
Topic: camera for touring
Replies: 61
Views: 3474

Re: camera for touring

I looked up that Sony which has a much bigger sensor and many more pixels, but, a mucher poorer zoom as a result. So its demonstrates clearly that cameras are a collection of compromises, a thing that camera reviewers seem to struggle with. The Sony RX100 also lacks a viewfinder. (The RX100 III, on...
by Samuel D
13 Jul 2015, 9:43pm
Forum: Does anyone know … ?
Topic: Electric gear shifting?
Replies: 282
Views: 9377

Re: Electric gear shifting?

http://www.cyclingweekly.co.uk/reviews/gears-drivetrain/ultegra-di2 quite honest I thought. Surely you jest? It’s typical magazine fluff. Advertisement masquerading as content in order to sell more ads. It asks none of the relevant questions and certainly doesn’t answer them. It reveals the writers...
by Samuel D
12 Jul 2015, 8:42pm
Forum: Does anyone know … ?
Topic: Electric gear shifting?
Replies: 282
Views: 9377

Re: Electric gear shifting?

Maybe dodgy gearing (Ultegra 10 speed) then. More likely dodgy set-up, surely? Electric shifting isn’t immune to problems from rough terrain either. A few days ago Pinot saw his Tour de France GC chances go up in smoke on the cobbles (Stage 4) because his Shimano electric shifting stopped working (...
by Samuel D
12 Jul 2015, 1:29pm
Forum: Bikes & Bits – Technical section
Topic: Rust-resistant chains by KMC (or others)
Replies: 8
Views: 1537

Re: Rust-resistant chains by KMC (or others)

My old chain (actually a not very old KMC Z8; I was disappointed how quickly it wore out) has lots of visible rust on the outer plates. Of course not remotely enough to compromise its strength, but perhaps enough to increase internal wear? The bike has been used in mostly dry weather and stored indo...
by Samuel D
12 Jul 2015, 11:21am
Forum: Bikes & Bits – Technical section
Topic: Rust-resistant chains by KMC (or others)
Replies: 8
Views: 1537

Rust-resistant chains by KMC (or others)

I had to order another chain yesterday. Went with a KMC X8.99 as a compromise between durability, price, and availability (wanted a Wippermann Connex 808 but my usual suppliers didn’t have them in stock). I noticed KMC also has an “EPT” range of chains, which I hadn’t seen before. EPT stands for Eco...
by Samuel D
12 Jul 2015, 10:37am
Forum: Does anyone know … ?
Topic: Electric gear shifting?
Replies: 282
Views: 9377

Re: Electric gear shifting?

In one sense I agree but the same could be said about any new innovation in cycling,disc brakes,dérailleurs,STI's,etc. Some of those things do detract from the simple beauty of cycling, but none of them use a power source other than the human in the saddle. That to me is an important distinction. I...
by Samuel D
11 Jul 2015, 11:32pm
Forum: Bikes & Bits – Technical section
Topic: 16 spoke "normal" wheels
Replies: 8
Views: 962

Re: 16 spoke "normal" wheels

Shimano RS11 maybe? (Click on hub pictures, etc.)
by Samuel D
11 Jul 2015, 2:41pm
Forum: Does anyone know … ?
Topic: Electric gear shifting?
Replies: 282
Views: 9377

Re: Electric gear shifting?

I don’t doubt that electric shifting can work well, but: ⋅ cable shifting works well enough that further improvement is pointless from a practical perspective ⋅ the last thing I want is another battery to keep charged ⋅ it is contrary to the simple beauty and self-power...
by Samuel D
11 Jul 2015, 2:29pm
Forum: Does anyone know … ?
Topic: Ps driving me crazy.
Replies: 13
Views: 817

Re: Ps driving me crazy.

The Zaffiro manages to combine terrible ride quality (my Dawes Clubman came with Zaffiros), unimpressive rolling resistance, and poor puncture protection in one tyre. Of course it is cheap, so I suppose you get what you pay for.
by Samuel D
9 Jul 2015, 1:23pm
Forum: Bikes & Bits – Technical section
Topic: Tyre width ??!!
Replies: 33
Views: 1412

Re: Tyre width ??!!

one of the factors is that the reason the wider tyres are more comfy is that the spring rate of the tyre is lower; this can lead to some dissipation of effort during the hardest climbing/sprinting/en danseuse Perhaps for this reason (or simple aerodynamics?), sprinters Greipel and Cavendish used 25...
by Samuel D
9 Jul 2015, 11:35am
Forum: Bikes & Bits – Technical section
Topic: Tyre width ??!!
Replies: 33
Views: 1412

Re: Tyre width ??!!

Pwa: at a constant speed, rotating mass need not be distinguished from all-up mass. It is only when changing speed that the energy needed to accelerate the spinning must be added to the energy needed to accelerate it in the overall direction of travel. But I suppose you know that, so perhaps I misun...
by Samuel D
9 Jul 2015, 10:07am
Forum: Bikes & Bits – Technical section
Topic: Tyre width ??!!
Replies: 33
Views: 1412

Re: Tyre width ??!!

I don't know why, but lightweight 25mm tyres do feel a bit more nippy on a hilly ride than the same tyre in 28mm with a heavier inner tube. I think the hard part is separating feeling from fact. Obviously lighter wheels will be faster uphill, since it requires less work to raise them against gravit...