Search found 31904 matches

by Brucey
19 Jan 2019, 7:00pm
Forum: Bikes & Bits – Technical section
Topic: Grant Petersen’s Rivendell Roadini
Replies: 87
Views: 2485

Re: Grant Petersen’s Rivendell Roadini

years ago one of my chums rode a CX frameset on the road. He had absolutely no intention of straying off tarmac for long; he rode time trials, road races, and even toured on it. It (of course) made stuff-all difference that he had the mafacs sticking out sideways as he did, it just made everything e...
by Brucey
19 Jan 2019, 5:59pm
Forum: Bikes & Bits – Technical section
Topic: Rear Tandem Hub
Replies: 5
Views: 114

Re: Rear Tanderm Hub

I think you have done the right thing. Unsupported axles on wide tandem rear hubs are vulnerable to breakage. If they are not very strong they just bend in normal service. Even if they don't do that they can still fatigue. Roughly if you replace an axle that bent with a stronger one, it ought to be ...
by Brucey
19 Jan 2019, 5:45pm
Forum: Bikes & Bits – Technical section
Topic: Sturmey Archer Sprinter Elite 5-speed - modern replacement?
Replies: 10
Views: 305

Re: Sturmey Archer Sprinter Elite 5-speed - modern replacement?

bearing in mind that the thumbshifter has the same (flawed) guts in as the one for the (W) hubs and the red bezel sprinter thumbshifter, it is probably prudent to use the RX thumbshifter in the same way too, i.e. to pull the shifter back to the detent after every downshift.

cheers
by Brucey
19 Jan 2019, 1:36pm
Forum: Bikes & Bits – Technical section
Topic: Kool Stop vs. Swissstop?
Replies: 4
Views: 155

Re: Kool Stop vs. Swissstop?

I prefer the term 'brake block' to 'pad' simply because it is immediately obvious that you are talking about a rim brake and not a disc brake. Similarly I try and avoid the use of the term 'brake shoe' except in reference to drum brakes, for comparable reasons. I'd also suggest that rim brake block ...
by Brucey
19 Jan 2019, 12:39pm
Forum: Bikes & Bits – Technical section
Topic: Shimano Brake Blocks
Replies: 22
Views: 716

Re: Shimano Brake Blocks

BR-RE600 type look shorter and/or wider than BR-RE700 type, but I have never had both in my hand at the same time....

cheers
by Brucey
19 Jan 2019, 11:25am
Forum: Bikes & Bits – Technical section
Topic: Spoke Re-use: Sorting insides from outsides
Replies: 11
Views: 428

Re: Spoke Re-use: Sorting insides from outsides

M4 washers will fit over a standard nipple shank but a) they may not allow the nipple to articulate fully and b) they have a sharp edge that will bear against a radius at the base of the nipple. This may cause gouging in the nipple. IIRC some V brake washers offer a curved seating and may do a bette...
by Brucey
19 Jan 2019, 11:15am
Forum: Bikes & Bits – Technical section
Topic: Shimano Brake Blocks
Replies: 22
Views: 716

Re: Types of Campagnolo Brake Block inserts

regarding campag (road) brake inserts; AFAICT (please correct me if this is not the case) then there are the following main types 1) '2010' inserts, http://www.oldbici.it/wp-content/uploads/2017/02/campagnolo-brake-pads-new-super-record-campy-oldbici-3.jpg these fit brakes from the 1970s and 1980s s...
by Brucey
19 Jan 2019, 10:02am
Forum: Bikes & Bits – Technical section
Topic: Grant Petersen’s Rivendell Roadini
Replies: 87
Views: 2485

Re: Grant Petersen’s Rivendell Roadini

side-mounted braze-ons are OK and avoid rust traps on the top of the top tube. But you can still get corrosion around these braze-ons ( if the flux residues are not removed, it is guaranteed) and on a bike with caliper brakes, a) the handedness of the caliper is set, you can't change it without havi...
by Brucey
19 Jan 2019, 9:04am
Forum: Bikes & Bits – Technical section
Topic: Tyre repairs
Replies: 7
Views: 321

Re: Tyre repairs

most things either don't work at all or fall out/come unstuck after a short while; a palliative for the mind rather than the tyre itself.

cheers
by Brucey
18 Jan 2019, 7:24pm
Forum: Bikes & Bits – Technical section
Topic: Shimano Brake Blocks
Replies: 22
Views: 716

Re: Shimano Brake Blocks

foxyrider wrote:Just for completeness - i'm using Swisstop blue BXP's which are for Campag 10/11 brakes (not sure how the number of gears affects the brake blocks?)


prior to 10s they used a different pattern of holder....?

cheers
by Brucey
18 Jan 2019, 5:22pm
Forum: Bikes & Bits – Technical section
Topic: Shimano Brake Blocks
Replies: 22
Views: 716

Re: Shimano Brake Blocks

http://www.swissstop.com/downloads/catalogue/2019/SwissStop2019_PUB_EN_sp_uLR.pdf more detail here http://www.swissstop.ch/tech/compounds including (on one of the pages in the pdf) graphs showing retarding force vs lever pressure. This at least gives you the MA x mu value. [120N at the lever gives ...
by Brucey
18 Jan 2019, 4:16pm
Forum: Bikes & Bits – Technical section
Topic: Tubeless for a Single Speed?
Replies: 10
Views: 212

Re: Tubeless for a Single Speed?

which suggests that the tyres ought to be 25mm wide. However I have seen tyres with these markings which vary in actual width from 21mm to about 28mm. So if you are running short of clearance then best to check both the width of the ones you have and the actual (fitted, allowing for rim width variat...
by Brucey
18 Jan 2019, 4:10pm
Forum: Bikes & Bits – Technical section
Topic: Grant Petersen’s Rivendell Roadini
Replies: 87
Views: 2485

Re: Grant Petersen’s Rivendell Roadini

I can understand why you have chosen each of those things but some of them are things that you could learn to live with and others make relatively little difference. For example if you test ride a bike with different steering geometry or flex, you will feel it for sure but you might in time get used...
by Brucey
18 Jan 2019, 3:24pm
Forum: Bikes & Bits – Technical section
Topic: Tubeless for a Single Speed?
Replies: 10
Views: 212

Re: Tubeless for a Single Speed?

most of the rims are meant for this width tyre, running lower pressures only works well with wider tyres, the Crr values work best in your favour with this width tyre, and the leakage rate rapidly becomes a PITA with narrower tyres. On the latter point at the same leakage rate, 23mm tyres will lose ...
by Brucey
18 Jan 2019, 3:15pm
Forum: Bikes & Bits – Technical section
Topic: Spoke Re-use: Sorting insides from outsides
Replies: 11
Views: 428

Re: Spoke Re-use: Sorting insides from outsides

extrusion dies do wear but this contributes little to ERD variations. These mostly come from bad manufacturing practice, simple as that. BTW in this brave new world of tubeless rims, the tolerable variation in ERD (from a tyre fit perspective) is much smaller than that which would cause you to use d...