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by Brucey
18 Sep 2018, 2:08pm
Forum: Bikes & Bits – Technical section
Topic: Wheel component recommendations please!
Replies: 3
Views: 55

Re: Wheel component recommendations please!

there are a few Kinlin rims (which come in symmetric/asymmetric versions) that are worth a look, Spa cycles have them. https://www.spacycles.co.uk/m2b195s116p0/Parts-and-Accessories/KINLIN/Components-Wheels-Rims IIRC the profile in the more expensive model ( XR-31, 19mm internal width) is a 'tubeles...
by Brucey
18 Sep 2018, 11:48am
Forum: Bikes & Bits – Technical section
Topic: Never using an adjustable torque wrench again!
Replies: 31
Views: 909

Re: Never using an adjustable torque wrench again!

.... I have some torque wrenches, and the ability to calibrate them at work. FWIW, when I have found a torque wrench to be significantly out of calibration, the lubricant will have gone. I've not had them stay calibrated again, even if re-lubricated correctly. I wonder why they have not stayed in c...
by Brucey
18 Sep 2018, 11:36am
Forum: Bikes & Bits – Technical section
Topic: Wheel component recommendations please!
Replies: 3
Views: 55

Re: Wheel component recommendations please!

Sapim DB spokes are a slightly lighter and (often) slightly cheaper than DT comp ones. Depending on the tension balance in the rear wheel you can build a nice wheel with DT on the DS and Sapim on the NDS (and at the front). I like archetypes for sure but there are other options that use offset rims ...
by Brucey
18 Sep 2018, 11:27am
Forum: Bikes & Bits – Technical section
Topic: 32 spokes in a 40 hole hub
Replies: 7
Views: 153

Re: 32 spokes in a 40 hole hub

The thread begs the question why would the OP want to,especially on a trike which has far more side loading than a two wheeler. Just puzzled. . I suspect it is rim availability. BTW there is no getting away from the increases in spoke tension that side loading causes entirely, but the stiffer the r...
by Brucey
18 Sep 2018, 11:18am
Forum: Bikes & Bits – Technical section
Topic: Never using an adjustable torque wrench again!
Replies: 31
Views: 909

Re: Never using an adjustable torque wrench again!

At some point I think I will get one of those Ritchey ones (it's set at one torque, with a dial to swap between something like 4Nm, 5Nm and 6Nm only) for doing stem bolts and chainring bolts. It is important IMO to have those with the bolts at an even pressure... The biggest errors usually come at ...
by Brucey
18 Sep 2018, 10:56am
Forum: Bikes & Bits – Technical section
Topic: 32 spokes in a 40 hole hub
Replies: 7
Views: 153

Re: 32 spokes in a 40 hole hub

the method for this combination is given here; https://forum.cyclinguk.org/viewtopic.php?f=5&t=118718&p=1184801&hilit=spoking#p1184801 Note that as specified, the spokes either side of the unused holes don't cross one another. There is another solution to the problem in which the spokes ...
by Brucey
18 Sep 2018, 10:50am
Forum: Bikes & Bits – Technical section
Topic: Never using an adjustable torque wrench again!
Replies: 31
Views: 909

Re: Never using an adjustable torque wrench again!

dangling weights etc is a pretty good way of checking the calibration of a clicky torque wrench, but having a beam wrench to hand is even better of course. If you torque stuff on a daily basis then a clicky wrench is just easier to use on most jobs. There are a few (just a few, mostly on cars) jobs ...
by Brucey
18 Sep 2018, 10:32am
Forum: Bikes & Bits – Technical section
Topic: 130Kg on a 2012 Brompton
Replies: 5
Views: 115

Re: 130Kg on a 2012 Brompton

I would recommend that you fit new tyres sooner rather than later; the fabric in old tyres may already be rotted and if the rubber in the tyres is cracked at all (and it normally is, in neglected bikes), then the fabric in the tyres will likely soon rot even if it isn't rotted already.

cheers
by Brucey
18 Sep 2018, 10:26am
Forum: Bikes & Bits – Technical section
Topic: Bike randomly changing gears.
Replies: 28
Views: 564

Re: Bike randomly changing gears.

there are quite a few other things that can cause this kind of thing to happen; a worn rear mech is just the first one on the list. For example if the frame is springy/flexy then the cable can be pulled as you ride and this can cause unwanted shifting to occur. This is familiar enough in FS MTBs tha...
by Brucey
18 Sep 2018, 9:33am
Forum: Bikes & Bits – Technical section
Topic: 32 spokes in a 40 hole hub
Replies: 7
Views: 153

Re: 32 spokes in a 40 hole hub

works fine; you can do it with just two spoke lengths, too.

I did a post (about 9 months ago?) which listed a lot of different combinations and IIRC that was one of the easier ones.

cheers
by Brucey
17 Sep 2018, 11:23pm
Forum: Bikes & Bits – Technical section
Topic: BB7 brake issue I think
Replies: 4
Views: 157

Re: BB7 brake issue I think

on both BB5 and BB7 brakes the fixed pad is rigidly mounted and unable to articulate, but the moving pad is pushed by a 'pressure foot' that is able to articulate. The foot (in BB5 form, I think BB7 is the same in this respect) sees various forces; - it is pushed by the ball/ramp 'piston' via a cent...
by Brucey
17 Sep 2018, 10:14pm
Forum: Bikes & Bits – Technical section
Topic: BB7 brake issue I think
Replies: 4
Views: 157

Re: BB7 brake issue I think

so which parts have been replaced?

cheers
by Brucey
17 Sep 2018, 7:33pm
Forum: Bikes & Bits – Technical section
Topic: Sealed BB - rotation tight when installed
Replies: 3
Views: 211

Re: Sealed BB

the preload on the bearings is always affected by how tightly a shimano cartridge BB is fitted; if the threads in the BB shell are not perfect it can make things palpably worse at a lower torque. Very often when refitting a well-used unit (which has a tiny amount of free play when the thing is out o...
by Brucey
17 Sep 2018, 7:20pm
Forum: Bikes & Bits – Technical section
Topic: Never using an adjustable torque wrench again!
Replies: 31
Views: 909

Re: Never using an adjustable torque wrench again!

Not sure if this is worth using anymore.... they do look pretty jiggered. They look as if the bolts have been fitted/assembled dry, the crank spline interface (which would never have been tight enough as a consequence) has moved and has worn, and then the bolts have been tightened again. I think th...
by Brucey
17 Sep 2018, 7:11pm
Forum: Bikes & Bits – Technical section
Topic: Never using an adjustable torque wrench again!
Replies: 31
Views: 909

Re: Never using an adjustable torque wrench again!

I assume the torque spec' varies with how/if the thread has been lubed (dry, oil, grease, anti-seize etc..) is a c. 20% tolerance enough to cover this? Torque is usually specified dry. A lubricated thread will show a lower torque than the "real" value, and so overtightening will occur. By...