Search found 178 matches

by Mr Evil
13 Dec 2019, 3:51pm
Forum: Bikes & Bits – Technical section
Topic: Frameset transplant: Spa Titanium Touring
Replies: 84
Views: 2289

Re: Frameset transplant: Spa Titanium Touring

Foghat wrote:...Rack mounts feature M6 threads, which seem far more appropriate than M5 - why don't all rack-capable frame designers specify this?..

M5 bolts are stronger than you might think. Strong enough to carry the weight of anything you might reasonably put on the back of a bike.
by Mr Evil
12 Dec 2019, 6:05pm
Forum: Bikes & Bits – Technical section
Topic: Frameset transplant: Spa Titanium Touring
Replies: 84
Views: 2289

Re: Frameset transplant: Spa Titanium Touring

'Tis a nice machine. I think I'll live with the bottle cages because doing so fits with the self-image I like to foster: as someone who doesn't bother about things like that... By signalling that you don't care about things like that, you are in fact caring about things like that :p If it was my bik...
by Mr Evil
10 Dec 2019, 5:29pm
Forum: Bikes & Bits – Technical section
Topic: No fuse in battery charger for 8.4v bike light battery?
Replies: 41
Views: 1242

Re: No fuse in battery charger for 8.4v bike light battery?

There's only one place in the world I trust sells genuine 18650 batteries online and that's nkon.nl in the Netherlands... There are plenty of places that sell real 18650s. Last time I bought one it was from http://www.fenixtorch.co.uk/ . I didn't buy direct from China since I wanted a high-capacity...
by Mr Evil
6 Dec 2019, 4:04pm
Forum: Bikes & Bits – Technical section
Topic: No fuse in battery charger for 8.4v bike light battery?
Replies: 41
Views: 1242

Re: No fuse in battery charger for 8.4v bike light battery?

I do want a decent version of this but it's a weird voltage and seems specific to bike light battery packs. It's easy to find adapters with several fittings that plug into just about anything with 3V/6V/9V settings but no 8.4v setting. Trust me if there was a £9.99 plug that had Japanese internals ...
by Mr Evil
5 Dec 2019, 9:24pm
Forum: Bikes & Bits – Technical section
Topic: No fuse in battery charger for 8.4v bike light battery?
Replies: 41
Views: 1242

Re: No fuse in battery charger for 8.4v bike light battery?

If I read the PCB printing correctly, the axial component next to the left hand red cable is actually a fuse (1A 250V AC). Yes, it looks like a fusible resistor to me. Samsung is a reputable company. Their mobile phone chargers don't have a fuse. That's because they don't have a mains cable. The pl...
by Mr Evil
3 Oct 2018, 4:51pm
Forum: Does anyone know … ?
Topic: Flat pedals on Road Bike
Replies: 52
Views: 1787

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: 1787

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: 432

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: 323

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: 2154

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: 795

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: 795

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: 389

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: 1856

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: 217

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...