Search found 173 matches

by Mr Evil
3 Oct 2018, 4:51pm
Forum: Does anyone know … ?
Topic: Flat pedals on Road Bike
Replies: 52
Views: 1664

Re: Flat peddles on Road Bike

How do you think friction works if it's not interlocking of asperities spread across the whole surface? The minimum force required to stop slipping is basically the same, if I remember the physics correctly (which I might not, or there might be some factor not covered in school-level physics). The ...
by Mr Evil
3 Oct 2018, 11:20am
Forum: Does anyone know … ?
Topic: Flat pedals on Road Bike
Replies: 52
Views: 1664

Re: Flat peddles on Road Bike

Wellgo WR-1 . They're small enough to not look out of place on a road bike. Decently grippy without pins. ...Logically, how can a small number of small pins exert the same sort of friction as large grippy rubber pads without far higher pressure on the even smaller pin-sole contact points? Get good ...
by Mr Evil
26 Sep 2018, 7:28pm
Forum: Does anyone know … ?
Topic: Anodised frame?
Replies: 5
Views: 415

Re: Anodised frame?

Note that anodizing will slightly reduce the fatigue strength of a frame (because the hard surface can crack, and those cracks can then propagate into the metal beneath).
by Mr Evil
22 Sep 2018, 12:26am
Forum: Bikes & Bits – Technical section
Topic: Sourcing a new thru axle
Replies: 3
Views: 272

Re: Sourcing a new thru axle

There are an infuriatingly large number of thru-axle standards, both front and rear. All of the front ones I have seen before have been 1.5mm pitch, but a bit of searching found two M12x1 front axles: one that claims to be a Syntace standard and one Specialized (I'm not suggesting those places as so...
by Mr Evil
13 Sep 2018, 10:58pm
Forum: Does anyone know … ?
Topic: Bought £1700 Carbon Bike - Now scared to use it.
Replies: 41
Views: 2070

Re: Bought £1700 Carbon Bike - Now scared to use it.

...How fragile is carbon in real use? Can I even use it for such stuff?.. It's more than tough enough to stand up to anything that you can do to it while staying on two wheels. It's not so good at coping with impacts though, of the sort that might happen if the bike falls over, or you drop somethin...
by Mr Evil
25 Jul 2018, 7:07pm
Forum: Bikes & Bits – Technical section
Topic: Which (Dremel?) cutting disc for cable outers?
Replies: 16
Views: 739

Re: Which (Dremel?) cutting disc for cable outers?

For what? How have I lived for my whole (nearly) 66 years and not needed one? 1) Pretty much everything. 2) Some people go through their whole lives without owning any tools at all. That doesn't mean that any given tool is not useful. Since mikeymo said that he has "most power tools known to m...
by Mr Evil
25 Jul 2018, 9:21am
Forum: Bikes & Bits – Technical section
Topic: Which (Dremel?) cutting disc for cable outers?
Replies: 16
Views: 739

Re: Which (Dremel?) cutting disc for cable outers?

^^^ +1 Mind you, how many times do you renew cables? Is it worth going to any expense for anything special? Mercian's Ergo cables haven't been touched since 2014. (sorry, new RH Ergo inner in 2016) Moulton's haven't been touched by me as yet. Bought assembled brand new in spring 2016. A rotary tool...
by Mr Evil
12 Jul 2018, 5:24pm
Forum: Bikes & Bits – Technical section
Topic: Advice on lever pull on my mechanical disc brakes
Replies: 5
Views: 356

Re: Advice on lever pull on my mechanical disc brakes

The specs shows that it might have either 140 or 160mm discs fitted, depending on the year. Disc size has a significant effect on braking power, with 140mm being a bit wimpy.
by Mr Evil
10 Jul 2018, 5:13pm
Forum: Bikes & Bits – Technical section
Topic: Roller Pinion + Shaft Drive
Replies: 24
Views: 1782

Roller Pinion + Shaft Drive

In a change from overpriced bearings, CeramicSpeed have shown a drivetrain consisting of a shaft driven by a roller pinion , which they claim can reach 99% efficiency. Compared to the 98% of a typical chain drive, that might not sound like a big improvement, but that's half the losses, which is actu...
by Mr Evil
6 Jul 2018, 11:01am
Forum: Bikes & Bits – Technical section
Topic: Inline seatpost
Replies: 2
Views: 201

Re: Inline seatpost

You're right; the lower down the pivot is, the more the saddle will move forward as you tilt it forward. You can calculate the amount exactly using x = r sin(a) where x is the distance the saddle moves forward, r is the radius of the circle (distance between the pivot and the top of the saddle), and...
by Mr Evil
23 May 2018, 4:59pm
Forum: Does anyone know … ?
Topic: Jockey wheels
Replies: 15
Views: 1312

Re: Jockey wheels

The utility cyclist wrote:you can use any, bigger is better.

If you use bigger ones, you might need a longer chain. They will also be closer to the cassette, so you might have to adjust the b-tension screw. In the extreme, if there is no adjustment left then you wont' be able to use bigger ones at all.
by Mr Evil
20 May 2018, 12:35pm
Forum: Bikes & Bits – Technical section
Topic: small lead-acid sealed gel batteries
Replies: 3
Views: 226

Re: small lead-acid sealed gel batteries

Lead-acid batteties have been pretty much totally superseded by Li-Ion batteries anywhere that weight matters.
by Mr Evil
20 May 2018, 12:27pm
Forum: On the road
Topic: Guards n gears
Replies: 11
Views: 906

Re: Guards n gears

I have one bike with and one without mudguards. On the one without mudguards, the drivetrain end up covered in crunchy grit in short order if I ride it in the rain, requiring constant washing. The bike with mudguards can go through weeks of rain without needing to clean the drivetrain.
by Mr Evil
6 May 2018, 7:16pm
Forum: Does anyone know … ?
Topic: Weightless bike: what would change?
Replies: 25
Views: 1474

Re: Weightless bike: what would change?

brynpoeth wrote:...are there bikes even lighter than 7 kg?

7kg? That's a boat anchor, not a bike. You need to get down below 3kg before it's truly light.
by Mr Evil
6 May 2018, 7:12pm
Forum: Bikes & Bits – Technical section
Topic: pedal washers
Replies: 27
Views: 3273

Re: pedal washers

Why on earth would you use copper-ease to keep water out of threads? (I assume you mean Copaslip or similar; the tin's a bit of a giveaway - it says "High Temperature Anti-seize compound" or similar. So if you're trying to keep high-temperature steam pipe flanges, or diesel exhaust bolts,...