Search found 698 matches

by NetworkMan
19 Oct 2019, 1:31pm
Forum: Bikes & Bits – Technical section
Topic: Cannondale Headset Expander Plug
Replies: 8
Views: 213

Re: Cannondale Headset Expander Plug

No need to guess. If you take off the top cap you should see the end of the steerer a few mm. below the stem (or spacer(s)). If the steerer is flush, or nearly flush, then there is a problem. Another thought. If you remove top cap and adjusting bolt you could gently screw the bolt into the bung with...
by NetworkMan
18 Oct 2019, 11:34am
Forum: Bikes & Bits – Technical section
Topic: Which bike?
Replies: 24
Views: 716

Re: Which bike?

Help! I am in my late 60’s and ride about 3-4000 miles a year, almost all on lanes, voie vertes in France, and similar. My main bike is a Thorn Mercury with a Rohloff hub - fabulous for French touring with a full load, but a bit slow and heavy (15kg) for the large part of the year when I am simply ...
by NetworkMan
17 Oct 2019, 7:07pm
Forum: Bikes & Bits – Technical section
Topic: Rack with shorter legs to suit 26in wheels(559)?
Replies: 5
Views: 398

Re: Rack with shorter legs to suit 26in wheels(559)?

I looked at a Tortec Ultralight when after a lightweight rack for my 700c bike. It's taller than some other 700c racks and I eventually got a Tubus Fly. Sorry if this info is too late to help much.
by NetworkMan
16 Oct 2019, 8:40pm
Forum: Bikes & Bits – Technical section
Topic: Which bike?
Replies: 24
Views: 716

Re: Which bike?

Ordinary lycra shorts and tops, aerodynamics a bit academic at the speeds I ride! Don’t be too sure about that! At 20 km/h, about half of your power is used to overcome aerodynamic drag. So reducing drag has a big effect on speed. You might be surprised how much a tight-fitting winter jacket reduce...
by NetworkMan
16 Oct 2019, 7:22pm
Forum: Bikes & Bits – Technical section
Topic: Which bike?
Replies: 24
Views: 716

Re: Which bike?

OK, I'll stick my neck out....
For speed in order of importance.
1. Training and fitness.
2. Aerodynamics - clothes and riding position.
3. Tyres.
4. Weight of rider.
5. Weight of bike.

This might change if it's extremely hilly.
by NetworkMan
16 Oct 2019, 12:11pm
Forum: Bikes & Bits – Technical section
Topic: New wheels for my steel framed racer ?
Replies: 10
Views: 382

Re: New wheels for my steel framed racer ?

Do you know the weight of what you have already? The MA3 is about 490g which is not that heavy.
by NetworkMan
15 Oct 2019, 7:14pm
Forum: Does anyone know … ?
Topic: Shoe sizing
Replies: 21
Views: 659

Re: Shoe sizing

gxaustin wrote:Like Cugel, I buy one EU size bigger - so a 44 instead of a 43.

Same here; my shoes are UK 8 or 42 but my Shimano shoes are 43.
by NetworkMan
13 Oct 2019, 8:32pm
Forum: Does anyone know … ?
Topic: Marathon Plus or Marathon Tour?
Replies: 28
Views: 991

Re: Marathon Plus or Marathon Tour?

It may or not matter but if the carcase is the same then I'd expect the 'tour' version to have significantly higher rolling resistance. Those individual tread blocks which help with grip on unmade roads and mud are each free to move around and that will absorb energy. It's the opposite extreme to a ...
by NetworkMan
13 Oct 2019, 2:53pm
Forum: Does anyone know … ?
Topic: changing a cassette - Shimano Sora
Replies: 23
Views: 854

Re: changing a cassette - Shimano Sora

if you start with the 13-26 (V group) cassette and the 11-34 (ca group) cassette you have two 13T sprockets which you might want to use as a top sprocket. Unfortunately I think neither will work. IIRC the 13, 14 pairing in the 13-26 nest together, i.e. the 13T is thicker than normal and part of the...
by NetworkMan
13 Oct 2019, 11:09am
Forum: Does anyone know … ?
Topic: Marathon Plus or Marathon Tour?
Replies: 28
Views: 991

Re: Marathon Plus or Marathon Tour?

On a related topic, I do have a few marathons but remain mind boggled by the variants. Can anyone point me at a simple guide to them all - with differences in easy to understand language? Yes, there are so many that recently I was almost put off buying any at all through indecision. In the end I we...
by NetworkMan
13 Oct 2019, 11:04am
Forum: Does anyone know … ?
Topic: Marathon Plus or Marathon Tour?
Replies: 28
Views: 991

Re: Marathon Plus or Marathon Tour?

https://www.google.com/aclk?sa=l&ai=DChcSEwjOia7945blAhXByN4KHTuyDb8YABAFGgJ3Yg&sig=AOD64_1DPstPvccHXzHXM1olUWP8FrLHlA&ctype=5&q=&ved=0ahUKEwjkrKf945blAhWLSRUIHaSFB4w4ChD1oAIIOw&adurl= Just bought a pair of GG in 700x 32 flavour for less than £36 incl p+p. :wink: https://yac...
by NetworkMan
12 Oct 2019, 3:19pm
Forum: Bikes & Bits – Technical section
Topic: New frame. Steep seat angle. Unrideable.
Replies: 81
Views: 4180

Re: New frame. Steep seat angle. Unrideable.

We still don't know how this resolved itself - do you feel like up dating us srb88? I think I may have missed this thread. If it's the builder I suspect they don't give any geometry on their website even though you can place on-line orders there. Perhaps the OP bought himself a Spa leather saddle. ...
by NetworkMan
12 Oct 2019, 2:14pm
Forum: Bikes & Bits – Technical section
Topic: Front derailleur capabilities - source?
Replies: 17
Views: 541

Re: Front derailleur capabilities - source?

Just to underline the point about advertised compatibility or lack of it. You can look at the Shimano "Compatability Chart" https://productinfo.shimano.com/#/com?cid=C-453&acid=C-455 .. If you look for 'drivetrain for road' -> 'front drivetrain compatibility' -> '3 x 9 speed' .... you'...
by NetworkMan
11 Oct 2019, 11:51am
Forum: Bikes & Bits – Technical section
Topic: Front derailleur capabilities - source?
Replies: 17
Views: 541

Re: Front derailleur capabilities - source?

As promised, some background to the points in my post upthread. Norman H has already addressed some of it. The 2 mm rule. Changing the size of a chainring by 1T changes the radius by 2 mm (actually more like 2.02 mm). This is useful, for example, when estimating how far you’ll need to move the FD wh...
by NetworkMan
10 Oct 2019, 4:20pm
Forum: Bikes & Bits – Technical section
Topic: Front derailleur capabilities - source?
Replies: 17
Views: 541

Re: Front derailleur capabilities - source?

Best is to find a copy of Cycle April/May 2003 and read the article "Beat the System". Short Summary; 1. Find the spec for your chainset from Shimano site. 50/39/30 for your (and my) Sora 9 speed. 2. Big ring: As spec +-4 teeth. So 46T to 54T. 3. Front difference: As spec. +0T -2T. So 9T t...