Search found 186 matches

by tbessie
6 Jun 2018, 10:41pm
Forum: Touring & Expedition
Topic: Alps tour - best route to Chamonix from west?
Replies: 0
Views: 169

Alps tour - best route to Chamonix from west?

Hi all! I'm currently at the start of my second week touring from Rocamadour to Munch via the Alps. Originally I had planned to get to Chamonix from Albertville; I'm currently in Voiron, going to Chambery tomorrow. I checked the elevation profile from Albertville to Chamonix and realized it's a bit ...
by tbessie
27 Mar 2018, 7:32pm
Forum: Bikes & Bits – Technical section
Topic: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?
Replies: 19
Views: 1741

Re: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?

Dropping the top tube can't influence the steering. As for structural failure at the top of the head tube...... I've seen 1930s/1940s lugless Higgins Ultralite head tubes "spread" where the headset fits.....because its lugless, and the way to make a steel frame light is to use less metal....
by tbessie
21 Mar 2018, 5:38pm
Forum: Bikes & Bits – Technical section
Topic: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?
Replies: 19
Views: 1741

Re: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?

As I posted originally, the small sizes have a dropped top tube. Look at the bike stood up against the green stone wall, I think its probably the second-smallest bike. Got it - I was looking for that configuration regardless of size (and wasn't sure about the actual size of each of the bikes pictur...
by tbessie
20 Mar 2018, 10:52pm
Forum: Bikes & Bits – Technical section
Topic: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?
Replies: 19
Views: 1741

Re: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?

the snail wrote:The image of the elan at top left under the main pic looks like the head tube extends above the top tube


Weird, some of them do and some of them don't; I wonder if that is related to the official bike "size".

- Tim
by tbessie
20 Mar 2018, 10:07pm
Forum: Bikes & Bits – Technical section
Topic: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?
Replies: 19
Views: 1741

Re: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?

Go to Spa Cycles website and look at Elan....that's a Ti frame.....the small sizes have both seat tubes and head tubes extended above the top tube.....you can call that a dropped top tube, if you like, and its for standover for short legs. Just to show alls fair in love and bicycles, the biggest si...
by tbessie
20 Mar 2018, 4:48pm
Forum: Bikes & Bits – Technical section
Topic: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?
Replies: 19
Views: 1741

Re: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?

I think most builders of steel bikes avoid sloping top tubes on lugged frames because of the difficulty of sourcing lugs with the required angles. Just for the record, the bike I'm having built is titanium, so I couldn't have lugs on it even if I wanted to (unless they've found a new technique for ...
by tbessie
20 Mar 2018, 12:37am
Forum: Bikes & Bits – Technical section
Topic: Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?
Replies: 19
Views: 1741

Custom Touring Bike : Top/Head Tube joint way lower to avoid slope?

Hey again folks... So as mentioned elsewhere, I'm having a custom touring bike built for me. The builder is making it with a quite long head tube and about 13 degrees of slope in the top tube, so that I can have the handlebars high for comfort, but still be able to stand over the bike. On another di...
by tbessie
19 Mar 2018, 6:33pm
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

some comments on nomenclature; a) it is '650B' not '650b' b) '650x33' is meaningless. '650Bx33' (or similar) has some meaning rather than none. c) There are 650A, 650B, and 650C rims sizes and they are all different. d) The 650A size is a French version of 26 x 1-3/8", similarly 650B = 26 x 1-...
by tbessie
19 Mar 2018, 6:11pm
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

I have a set of Donnelly MXP (650x33) on my cannondale slate. They're folding and tubeless. A bit heavy going for a touring bike, but they're lightweight and supple, so might not be too heavy on the resistance. They also appear to be pretty bullet proof. I've done a few flinty, rocky rides, with vi...
by tbessie
19 Mar 2018, 5:55pm
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

You seem to be of the opinion that a 32mm section tyre will be faster than a 38mm or 42. This has been de bunked many times in the last 5 years. If you read some of the Bicycle Quarterly articles on testing different section tyres you might change your mind. Even road racers use 25mm or 28 mm secti...
by tbessie
18 Mar 2018, 7:30pm
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

Hey all... So I'm having my dream touring bike built; I decided to go for 650b wheels, as 1) this is for an S&S coupled bike, so it'll be slightly easier to fit in the case without as much playing with the parts, and 2) it seems like 26" will be slowly dying while 650b will be slowly takin...
by tbessie
18 Mar 2018, 7:04pm
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

Schwalbe also do at least one tyre that comes up at 35mm as it's 1.35" Yeah, not a whole lot, tho', and not touring specific. Here's what they have under 40mm: https://www.schwalbetires.com/node/2366 https://www.schwalbetires.com/node/282 https://www.schwalbetires.com/node/3026 https://www.sch...
by tbessie
18 Mar 2018, 6:56pm
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

only tyres that are listed as xx-584 (in ISO size designation) will fit 650B rims. 584mm is the bead seat diameter of the rim. Yeah, I read several articles on the subject after your earlier post, and got schooled. Thanks for all the continuing education. :-) ... So there are a few choices. I expec...
by tbessie
18 Mar 2018, 6:54pm
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

only tyres that are listed as xx-584 (in ISO size designation) will fit 650B rims. 584mm is the bead seat diameter of the rim. Yeah, I read several articles on the subject after your earlier post, and got schooled. Thanks for all the continuing education. :-) ... So there are a few choices. I expec...
by tbessie
18 Mar 2018, 12:58am
Forum: Bikes & Bits – Technical section
Topic: 32x650b touring tires, anyone?
Replies: 28
Views: 1204

Re: 32x650b touring tires, anyone?

... lots of stuff snipp'ed ... If you want to buy 32mm tyres easily, maybe a different rim size would have been a better idea; 700C (622mm rim) would have been a good choice, however nothing is certain.... I am told that once upon a time (in the 1950s) the most popular tyre size in English lightwei...