Search found 169 matches

by NickJP
22 Jan 2020, 5:15am
Forum: Bikes & Bits – Technical section
Topic: GPS Computer with Maps etc
Replies: 9
Views: 355

Re: GPS Computer with Maps etc

A mapping app on a phone will do the directions for you. However, a) phone screens aren't easily readable in sunlight, b) you need a waterproof phone, or a waterproof cover for it, c) for a ride of any length, phone battery life may be inadequate, and d) you need some way of securely mounting the ph...
by NickJP
13 Jan 2020, 9:54pm
Forum: Bikes & Bits – Technical section
Topic: "Race" or "Endurance" bike ?
Replies: 19
Views: 887

Re: "Race" or "Endurance" bike ?

I'm 66 - I bought a Dolan GXA frame last year and built it up as a comfortable bike for mainly riding on sealed roads. I chose it because it has a BSA threaded bottom bracket shell, takes a standard 27.2 round seatpost, has rack and mudguard mounts, and will take tyres up to 45mm in size (bigger if ...
by NickJP
13 Jan 2020, 10:59am
Forum: Bikes & Bits – Technical section
Topic: pedal bearing designs and morons writing about them
Replies: 50
Views: 2043

Re: pedal bearing designs and morons writing about them

I've been using Speedplay Syzr pedals since they were released, and have not had any problem with the bearings. They have an annular ball bearing at the outboard end of the axle and a needle roller at the inboard end. The main reason I like them is that I detest float in pedals, and because these ha...
by NickJP
12 Jan 2020, 7:30pm
Forum: Bikes & Bits – Technical section
Topic: Mech hanger availability? Time to stock up?
Replies: 3
Views: 391

Re: Mech hanger availability? Time to stock up?

There is an attempt to fix the problem, but not much use to anyone who already has a frame with a hanger specific to that frame:

https://bikerumor.com/2019/09/10/sram-introduces-universal-derailleur-hanger-concept-and-its-brilliant/
by NickJP
7 Jan 2020, 10:53am
Forum: Bikes & Bits – Technical section
Topic: Super compact road double, how low can you go?
Replies: 26
Views: 1141

Re: Super compact road double, how low can you go?

I also concluded that I need around 40-42T minimum for the outer chainring in combination with the 11T sprocket for a decent top gear, but I would like to use the 22T inner, or as small as possible if that won't work, but it seems that if I resolve the problem with the chainring bolt nuts it will w...
by NickJP
7 Jan 2020, 8:03am
Forum: Bikes & Bits – Technical section
Topic: Super compact road double, how low can you go?
Replies: 26
Views: 1141

Re: Super compact road double, how low can you go?

As an experiment, I rode around for a while earlier this year on the road using a crankset with 32-22 chainrings. I used an old Deore XT M737 94BCD crankset, and replaced the outer chainring with a chainguard, leaving the original middle and inner chainrings. Mounted on a 107mm BB, this gave me the ...
by NickJP
7 Jan 2020, 7:16am
Forum: Bikes & Bits – Technical section
Topic: chain wear; another spot on the graph?
Replies: 21
Views: 1854

Re: chain wear; another spot on the graph?

one takeaway from this is that even very skinny modern chains can last well, under the right circumstances. These was a chain wear test published recently on the Cyclingtips website, and the results from that indicate that as chains have got narrower, they have become more durable: https://cyclingt...
by NickJP
4 Jan 2020, 10:53pm
Forum: Bikes & Bits – Technical section
Topic: Help please, first time fitting tubeless.
Replies: 39
Views: 819

Re: Help please, first time fitting tubeless.

Once the tyre is on, I then remove about 6" with tyre levers, turn one lever sideways to create an opening. Pour in 75 millilitres of Orange seal 'Endurance' The Orange sealant I got came with a tube to attach to the top of the bottle. The tube fits over the valve with the core removed. That s...
by NickJP
2 Jan 2020, 6:56am
Forum: Bikes & Bits – Technical section
Topic: SRAM O-rings for hydraulic shifters?
Replies: 11
Views: 435

Re: SRAM O-rings for hydraulic shifters?

In the past I've taken the brake hose with banjo attachment to a local bearing shop and they had the exact size of O-ring I needed. I bought half a dozen to have some spares against future need.
by NickJP
27 Dec 2019, 4:41am
Forum: Bikes & Bits – Technical section
Topic: 135mm 9 speed rear hub
Replies: 29
Views: 1282

Re: 135mm 9 speed rear hub

There's no problem using a centerlock rear disc hub with a rim brake rim and brakes. The hub flanges will be slightly closer together, but OTOH, the spoke tension mismatch left/right will be less than with a non-disc hub, so I don't think it builds up as a weaker wheel.
by NickJP
27 Dec 2019, 2:42am
Forum: Bikes & Bits – Technical section
Topic: Mudguard mounting LED tail-light with flashing mode?
Replies: 6
Views: 354

Mudguard mounting LED tail-light with flashing mode?

I'm looking for an LED tail-light designed for mounting on a rear mudguard, and which has a flashing mode for daytime use. The ones that I've found so far (AXA, Spanninga) don't have a flashing mode. Does what I'm looking for exist, or not?
by NickJP
19 Dec 2019, 8:42pm
Forum: Bikes & Bits – Technical section
Topic: Bar end mirror
Replies: 15
Views: 890

Re: Bar end mirror

I like the Cycle Aware Reflex mirror that sticks on the side of a helmet with double-sided tape. The arm and mirror is detachable from the mount if you want to remove it - I'll ride to a race with the mirror on, detach it for the race, and put it back for the ride home. I often think that the mirror...
by NickJP
17 Dec 2019, 12:18am
Forum: Bikes & Bits – Technical section
Topic: How low can you go? Gears.
Replies: 19
Views: 1010

Re: How low can you go? Gears.

My touring bike has a 17" low gear and 90" high gear (Rohloff hub with 17t sprocket and 38t chainring). And I definitely use the low gear on some of the mountains I've encountered when fully loaded in the Alps and Pyrenees. With the 17" gear I can maintain a fairly comfortable cadence...
by NickJP
13 Dec 2019, 10:33am
Forum: Bikes & Bits – Technical section
Topic: Tektro R539 compatible with old or new levers?
Replies: 3
Views: 332

Re: Tektro R539 compatible with old or new levers?

At least on the frame where I want to use these brakes, the framebuilder did his job correctly and the brake blocks are positioned at the bottom of the slot. If he hadn't, I would have rejected the frame as not meeting what I asked for, which was long reach calipers and maximum clearance to fit reas...
by NickJP
12 Dec 2019, 7:40pm
Forum: Bikes & Bits – Technical section
Topic: Tektro R539 compatible with old or new levers?
Replies: 3
Views: 332

Tektro R539 compatible with old or new levers?

The spring has broken in one of the old RX100 long reach brake calipers on one of my bikes, which are paired with some ~20-year-old SLR levers. I was thinking of getting some Tektro R539 calipers to replace the RX100, but can anyone tell me if the Tektro calipers are designed to work with the older ...