Search found 33499 matches

by Brucey
21 May 2019, 5:03pm
Forum: Does anyone know … ?
Topic: Panaracer Pasela Longevity
Replies: 1
Views: 182

Re: Panaracer Pasela Longevity

theory; your tubes perished (in your dark shed.....) for some other reason than UV.

cheers
by Brucey
21 May 2019, 5:01pm
Forum: Bikes & Bits – Technical section
Topic: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes
Replies: 17
Views: 557

Re: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes

the fact that the deeper rim is (all things being equal) stiffer is probably more important than any stiffness difference in the spokes per se. The way the wheels are built (by which I mean how the spokes fit and how the wheel is stress-relieved) is more important still, and you can't see that or al...
by Brucey
21 May 2019, 3:00pm
Forum: Does anyone know … ?
Topic: Rim tape
Replies: 11
Views: 520

Re: Rim tape

you can sometimes make life a bit easier for yourself with a tubeless rim (running tubes) by using a thin and narrow self-adhesive tape. You can't always do this (eg if the spoke drillings are set in a wide stagger) but having no rim tape over the bead seats can make it a bit easier to get the tyres...
by Brucey
21 May 2019, 2:47pm
Forum: Bikes & Bits – Technical section
Topic: Brompton wide range hub without derailleur
Replies: 2
Views: 181

Re: Brompton wide range hub without derailleur

you just need one sprocket, some extra spacers, and the wheel/gear internal. The shifter can stay, and provided you get the spacers in the right place, it can all be made to line up with the extant tensioner. The gears will be miles apart though. Gears with the two hubs on 50/13 gearing: http://ritz...
by Brucey
21 May 2019, 11:28am
Forum: The Tea Shop
Topic: I drove a normal car yesterday
Replies: 160
Views: 2624

Re: I drove a normal car yesterday

Mick F wrote:….Why haven't gearboxes evolved?...


Nothing could be further from the truth. Today, there is a bigger variety of different transmissions on various different cars than even before.

cheers
by Brucey
21 May 2019, 10:07am
Forum: Bikes & Bits – Technical section
Topic: Replacement SRAM X9 jockey wheels...?
Replies: 5
Views: 213

Re: Replacement SRAM X9 jockey wheels...?

SRAM pulleys vary. Some models use such designs as this https://images-na.ssl-images-amazon.com/images/I/418aV30LuuL._SY300_QL70_.jpg in which case aftermarket pulleys won't fit. Hence my earlier suggestion that you look carefully at the ones you have at present and act accordingly. cheers
by Brucey
21 May 2019, 9:50am
Forum: Bikes & Bits – Technical section
Topic: Brake drop gauge?
Replies: 2
Views: 191

Re: Brake drop gauge?

you can use an old brake for this purpose if you like. Note that because brakes vary in their offset from the mountings, and the wheel rim usually passes through the brake at a slight angle, it isn't possible to take definitive measurement. Brake blocks and brake tracks on rims vary in width too, al...
by Brucey
21 May 2019, 7:30am
Forum: Bikes & Bits – Technical section
Topic: Replacement SRAM X9 jockey wheels...?
Replies: 5
Views: 213

Re: Replacement SRAM X9 jockey wheels...?

last time I looked SJS had at least two different types of X9 pulley. IIRC year of mech is important, length of cage less so. You could compare the look of your pulleys with the alternatives and maybe decide that way. Aftermarket pulleys (and some shimano ones) are suitable alternatives for some (bu...
by Brucey
20 May 2019, 11:26pm
Forum: Bikes & Bits – Technical section
Topic: Brompton SRAM 3-speed spacer ring
Replies: 2
Views: 152

Re: Brompton SRAM 3-speed spacer ring

IIRC this spacer has a bore dimension that is common with - SA sprocket spacers - BB cup spacers (which go between the cup and the frame) - Shimano freehub/cassette spacers (eg of the sort that allow 8/9/10s cassettes to fit to 11s freehub bodies) all of which are available in various thicknesses. I...
by Brucey
20 May 2019, 11:19pm
Forum: Does anyone know … ?
Topic: Any use for knackered frame?
Replies: 13
Views: 662

Re: Any use for knackered frame?

Not with any great expectation of success, I've weld repaired several frames that have suffered similar failures. The repairs have lasted far longer than I expected them to.4 [edit: If you don't fancy that..... https://lh4.googleusercontent.com/-4xGH2BsAuPc/UxyrL1_eCWI/AAAAAAAAAE4/bj1um4YDjIQ/w758-h...
by Brucey
20 May 2019, 11:12pm
Forum: Does anyone know … ?
Topic: Tell me about… minivelos
Replies: 17
Views: 630

Re: Tell me about… minivelos

if you take a Raleigh Twenty, fit better gears/wheels and weld a crossbar in, you will come fairly close to the minivelo riding experience.

cheers
by Brucey
20 May 2019, 10:42pm
Forum: Bikes & Bits – Technical section
Topic: How much longer do drum brakes go
Replies: 9
Views: 524

Re: How much longer do drum brakes go

I've seen the insides of lots of coaster brake hubs, on a, uh, 'non-voluntary' basis.... Almost certainly more than I should have done, given the proportion of bikes that are fitted with them. Oddly enough prior to the mid 1930s, I am given to understand that the sturmey coaster brake 3s hub was a f...
by Brucey
20 May 2019, 2:47pm
Forum: Bikes & Bits – Technical section
Topic: Help. Frame broken.
Replies: 16
Views: 993

Re: Help. Frame broken.

that'll work!

cheers
by Brucey
20 May 2019, 11:12am
Forum: Bikes & Bits – Technical section
Topic: Running 135mm hubs in a 130 frame
Replies: 4
Views: 327

Re: Running 135mm hubs in a 130 frame

it might; I'd respace the hubs a bit narrower and redish as necessary. It is not that difficult to do, and if you take out 3mm that ought to be enough.

cheers
by Brucey
20 May 2019, 10:23am
Forum: Does anyone know … ?
Topic: Shimano road bike - info sought before sale
Replies: 31
Views: 1686

Re: Shimano road bike - info sought before sale

re the possible (probable) frame distortion; this is difficult to certain of because of possible lens distortion etc. However you can compare the clearance between the front wheel rim (not the tyre which can vary in size) and the down tube; in the photo I posted (assuming the frame is the same of co...