Search found 3059 matches

by Samuel D
27 Jun 2020, 1:12am
Forum: Bikes & Bits – Technical section
Topic: Specialized Allez: which new group set ?
Replies: 14
Views: 501

Re: Specialized Allez: which new group set ?

The cable housing lengths for the rear brake are a mile out. Quick-release skewers incorrectly positioned. Usually bikes that look like that have other set-up problems. An hour with a good mechanic may transform how it works. Hard to tell from this photo, but I’d expect most modern kit to fit, not t...
by Samuel D
26 Jun 2020, 9:57pm
Forum: Bikes & Bits – Technical section
Topic: Shimano long-arm front derailleurs: purpose of design?
Replies: 6
Views: 301

Re: Shimano long-arm front derailleurs: purpose of design?

So, looking at the big picture, 30 years of wasted technical ‘refinement’ in my opinion. It’s wasted on me too. I don’t have a problem to pedal gently while shifting (for one second?) and to shift down before my cadence drops to nothing. My interest in this is mechanical curiosity. All the same, I ...
by Samuel D
26 Jun 2020, 3:52pm
Forum: Bikes & Bits – Technical section
Topic: Shimano long-arm front derailleurs: purpose of design?
Replies: 6
Views: 301

Re: Shimano long-arm front derailleurs: purpose of design?

Oh, and a few other things Shimano has done to improve front shifting under load: ⋅ greater cable pull of front shifters ⋅ extra front-derailleur bracing against the frame, with an aluminium plate glued to the seat tube to take that load ⋅ hollow chainrings to enable gr...
by Samuel D
26 Jun 2020, 3:46pm
Forum: Bikes & Bits – Technical section
Topic: Shimano long-arm front derailleurs: purpose of design?
Replies: 6
Views: 301

Shimano long-arm front derailleurs: purpose of design?

In another thread, ElCani asked the question: “Can anyone tell me what was wrong with the pre long-arm designs?” I posit: nothing, provided the user has the wit to spin the cranks lightly for the duration of a front shift. This, though, is beyond the coordination of many riders as I see often on the...
by Samuel D
26 Jun 2020, 11:40am
Forum: Bikes & Bits – Technical section
Topic: New wheels or new tyres
Replies: 11
Views: 712

Re: New wheels or new tyres

Did you get the first bead on the rim at least? I did, although with real difficulty It sounds like this particular rim-tyre combination is impractically tight. But if you got the first bead on the rim, you can do it with the second. The second bead is no shorter than the first. The first bead natu...
by Samuel D
26 Jun 2020, 12:17am
Forum: Bikes & Bits – Technical section
Topic: New wheels or new tyres
Replies: 11
Views: 712

Re: New wheels or new tyres

Dwnglasgow wrote:Absolutely impossible to get on the rim.

Did you get the first bead on the rim at least?
by Samuel D
25 Jun 2020, 2:29pm
Forum: Bikes & Bits – Technical section
Topic: When is a standard not a standard? / Modern life is rubbish
Replies: 19
Views: 835

Re: When is a standard not a standard? / Modern life is rubbish

Given that I am a low strength/weight twiddler and would like loooooong service intervals, and am as likely to cycle in the rain as not, which type of bottom bracket design represents the best balance of quality and price? I will be using a single-ring chainset of around 46 teeth. In my opinion, a ...
by Samuel D
25 Jun 2020, 12:23am
Forum: Bikes & Bits – Technical section
Topic: Spoke Tension Meters
Replies: 54
Views: 1525

Re: Spoke Tension Meters

A fine job.

What surprises me anew is the strength of steel. You could swing my car from three 1.8 mm spokes.
by Samuel D
24 Jun 2020, 1:47pm
Forum: Bikes & Bits – Technical section
Topic: Spoke Tension Meters
Replies: 54
Views: 1525

Re: Spoke Tension Meters

531colin wrote:I'm sure Brucey will have a name for the curious pattern.

Not Brucey, but I’m fairly sure that’s the stocking stitch.
by Samuel D
24 Jun 2020, 12:27pm
Forum: Bikes & Bits – Technical section
Topic: Spoke Tension Meters
Replies: 54
Views: 1525

Re: Spoke Tension Meters

Biggest inaccuracy is the tension meter itself, measure the same spoke in a few places and get +/- 0.5 each time. I’ve wondered if a drop of oil at the contact points between tool and spoke, especially the outer two, would improve the reading consistency at the cost of impractical faff. My Wheel Fa...
by Samuel D
24 Jun 2020, 10:35am
Forum: Bikes & Bits – Technical section
Topic: An octagonal spanner.
Replies: 24
Views: 758

Re: An octagonal spanner.

Actually why can't a decent adjustable be used like a Bahco? Those aren't cheap but, it's not going to be £45. It will just round it off? Enormously heavy for the required size, for starters. If damage is a concern, a Knipex Plier Wrench in the required size would weigh about 0.25 kg and do a bette...
by Samuel D
24 Jun 2020, 10:24am
Forum: Bikes & Bits – Technical section
Topic: Spoke Tension Meters
Replies: 54
Views: 1525

Re: Spoke Tension Meters

I'm thinking the nipple will fail, with nuts and bolts over tightening usually causes the thread to fail, or is that just down to the turning motion when too tight? That hasn’t been my experience. The bolt usually snaps before the thread fails. I think that’s by design, since a damaged thread is in...
by Samuel D
24 Jun 2020, 8:30am
Forum: Bikes & Bits – Technical section
Topic: Giant Roam: raising handlebars?
Replies: 5
Views: 155

Re: Giant Roam: raising handlebars?

It’s probably a threadless fork steerer tube and headset. Height is adjusted by unscrewing the top cap that sets bearing preload, loosening the steerer tube clamp bolts on the stem, rearranging spacers from above the stem – if there are any – to below it or flipping the stem upside down so its angle...
by Samuel D
24 Jun 2020, 8:14am
Forum: Bikes & Bits – Technical section
Topic: Going cageless- how much ball space ?
Replies: 13
Views: 526

Re: Going cageless- how much ball space ?

I vote for more grease still. May as well. What stuff is it?

Are you going cageless because of a problem or to hope to stave off a problem? Just being nosy.
by Samuel D
23 Jun 2020, 6:41pm
Forum: Bikes & Bits – Technical section
Topic: Going cageless- how much ball space ?
Replies: 13
Views: 526

Re: Going cageless- how much ball space ?

Any gap is enough, but the trick is being certain the gap remains after assembly. That and the hope of packing in more grease is why some people leave more space.

Removing two or three balls is excessive by my reckoning too.