Search found 408 matches

by Keezx
15 Jun 2018, 4:48pm
Forum: Bikes & Bits – Technical section
Topic: Compact double road
Replies: 33
Views: 1042

Re: Compact double road

Heavy and with the disadvantages of both gearing systems might be 2 good reasons.
by Keezx
10 Jun 2018, 8:49am
Forum: Wanted
Topic: Sakae SR 118bcd 36
Replies: 7
Views: 685

Re: Sakae SR 118bcd 36

Miche Young chainrings have 116 mm BCD and cen be adapted to 118 mm.
by Keezx
9 Jun 2018, 7:27pm
Forum: Bikes & Bits – Technical section
Topic: Chainring change
Replies: 8
Views: 483

Re: Chainring change

The special chainrings are also called "triplelizer" and can still be found at small shops and Ebay. Couple of years ago I bought one for my Campagnolo Chorus carbon double chainset (square taper) with 39 T and 74 BCD holes and it works perfectly despite the missing shifting aids. 74 BCD o...
by Keezx
24 May 2018, 11:04pm
Forum: Bikes & Bits – Technical section
Topic: Slipping seatpost
Replies: 58
Views: 2107

Re: Slipping seatpost

I this https://www.sjscycles.co.uk/seat-posts/307-272-mm-gold-kcnc-sc13-twin-seat-post-clamp/ is both the normal seat clamp and a top collar in one. CUT After expieriencing a slipping (carbon) post on my China made titanium frame I ordered a similar double clamp ( it's on the market in al lot of br...
by Keezx
12 Apr 2018, 6:07pm
Forum: Bikes & Bits – Technical section
Topic: Should I replace or repair my broken original Brompton Archer 5 Speed hub?
Replies: 13
Views: 727

Re: Should I replace or repair my broken original Brompton Archer 5 Speed hub?

Had teh same , many years ago, also a folding bike , and repaired it. A small bar in which the pulling pin screws was broken. Not difficult for someone who is familiar with SA 3 speed hubs. After the repair it had only 4 speeds left, the top one was gone, never missed it, the 5 speeds were not the m...
by Keezx
21 Mar 2018, 8:55pm
Forum: Bikes & Bits – Technical section
Topic: Campag/Shimano mix
Replies: 10
Views: 529

Re: Campag/Shimano mix

That's why I use exclusively pre 2007 9 and 10 speed Ergopowers, they never gave me trouble the past 8 years and IF they do, I've numerous spares laying around.
Better avoid any Powershift Ergo's.
The 11 speed Ultrashift ones seem also good, but I don't need nor want 11 speed
by Keezx
16 Mar 2018, 3:01pm
Forum: Bikes & Bits – Technical section
Topic: I should really listen to my own advice more...
Replies: 25
Views: 1360

Re: I should really listen to my own advice more...

So you don't think gussets thicker than frame tubes are a stupid idea?
So buy another similar frame ....
by Keezx
16 Mar 2018, 2:22pm
Forum: Bikes & Bits – Technical section
Topic: Bottom Bracket for a Campag Chorus Triple chainset (2006 year).
Replies: 21
Views: 1190

Re: Bottom Bracket for a Campag Chorus Triple chainset (2006 year).

Main limitation is the size of the seat tube.
On a 28,6 and 31,6 seat tubes the 111 mm BB is fine, on bigger seat tubes you'll need the 115 mm.
by Keezx
16 Mar 2018, 1:28pm
Forum: Bikes & Bits – Technical section
Topic: I should really listen to my own advice more...
Replies: 25
Views: 1360

Re: I should really listen to my own advice more...

Poor construction of that frame....
I guess the designer/builder of that frame never saw this animation, it shows that the lower gussset is completely unnecessary:
Image
by Keezx
13 Mar 2018, 11:35am
Forum: Bikes & Bits – Technical section
Topic: 25mm tyres
Replies: 86
Views: 4890

Re: 25mm tyres

I remain convinced that what you feel while cycling is almost entirely irrelevant to performance and the only way to understand these phenomena is through physics, albeit imaginatively applied. The idea that you can feel any difference in rolling resistance between a 23 mm tyre and a 25 mm tyre is ...
by Keezx
13 Mar 2018, 11:33am
Forum: Bikes & Bits – Technical section
Topic: 25mm tyres
Replies: 86
Views: 4890

Re: 25mm tyres

You seem to have something against physics...... :wink:
by Keezx
9 Mar 2018, 10:28am
Forum: Bikes & Bits – Technical section
Topic: 25mm tyres
Replies: 86
Views: 4890

Re: 25mm tyres

Mick F wrote:
Keezx wrote:You don't have to be a physicist to know that moving mass, once up to speed ,does't need energy to keep moving.
Until you come to a hill.


Still no energy needed for moving/turning the wheel, only for bringing the mass up against gravity.
by Keezx
8 Mar 2018, 7:55pm
Forum: Bikes & Bits – Technical section
Topic: 25mm tyres
Replies: 86
Views: 4890

Re: 25mm tyres

Alan O wrote:
Keezx wrote:You don't have to be a physicist to know that moving mass, once up to speed ,does't need energy to keep moving.

Not in a vacuum with no friction it doesn't, no.


Still, air resistance and friction is independent from mass.
by Keezx
8 Mar 2018, 6:37pm
Forum: Bikes & Bits – Technical section
Topic: 25mm tyres
Replies: 86
Views: 4890

Re: 25mm tyres

You don't have to be a physicist to know that moving mass, once up to speed ,does't need energy to keep moving.
by Keezx
8 Mar 2018, 3:33pm
Forum: Bikes & Bits – Technical section
Topic: 25mm tyres
Replies: 86
Views: 4890

Re: 25mm tyres

I think you got my point. :wink:
On a hilly course 5 kg makes a difference , but 120 grams in the wheels, really?
All over the world people are brainwashed about wheel weights, 1400 grams are light and 1800 grams are boat anchors.
For me it's not much more than fetishism.