Search found 2684 matches

by Samuel D
26 May 2019, 1:17pm
Forum: Bikes & Bits – Technical section
Topic: Lubricants for ratchet mechanisms
Replies: 38
Views: 1485

Re: Lubricants for ratchet mechanisms

I bought three old ratchets and all three were not working as they should, at least two because of mistreatment by the previous owner. I think that suggests that incorrect lubrication is halfway common. Part of the problem (dried grease) was probably because the ratchets had sat in a cupboard for a ...
by Samuel D
25 May 2019, 5:43pm
Forum: Bikes & Bits – Technical section
Topic: Spa Audax build photos
Replies: 48
Views: 2433

Re: Spa Audax build photos

Looking good, geocycle. Maybe a black Carradice would look better still?

More Spa Audax builds needed in this thread!
by Samuel D
24 May 2019, 10:06pm
Forum: Bikes & Bits – Technical section
Topic: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes
Replies: 17
Views: 699

Re: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes

I personally wouldn't favour a low spoke count or especially deep rims. Deep rims can catch a gust of wind worse than shallow rims and this is potentially dangerous; it is windier than normal over many passes and yet it is more important than normal to hold your line accurately on the road too. And...
by Samuel D
24 May 2019, 5:52pm
Forum: Bikes & Bits – Technical section
Topic: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes
Replies: 17
Views: 699

Re: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes

When yo-yoing up a hill the easier acceleration of a lower-rotating-mass wheel is exactly offset by its slowing down more quickly. In other words with lighter wheels the yo-yo is more pronounced (which theoretically causes more loses to aerodynamic drag for a given average speed, not that you’d noti...
by Samuel D
24 May 2019, 5:46pm
Forum: Bikes & Bits – Technical section
Topic: Lubricants for ratchet mechanisms
Replies: 38
Views: 1485

Re: Lubricants for ratchet mechanisms

The Honda CG is an old favourite of mine because they were everywhere in Brazil where I spent part of my youth. (They were made in Manaus for a long time.) It was on a CG125 that I learned to ride a motorcycle … on a public road with no training and no helmet … at night … trying to impress the girl ...
by Samuel D
24 May 2019, 10:00am
Forum: Bikes & Bits – Technical section
Topic: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes
Replies: 17
Views: 699

Re: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes

I know there are differing views about this but I feel that I generally make faster progress on lighter wheels, and I reason that weight close to the outer edge of the rotating circle, i.e. tyre and rim, is more of a burden than weight close to the centre, i.e. the hub. This is true but if you calc...
by Samuel D
24 May 2019, 9:53am
Forum: Bikes & Bits – Technical section
Topic: Lubricants for ratchet mechanisms
Replies: 38
Views: 1485

Re: Lubricants for ratchet mechanisms

I didn't mention this exactly before but I usually lubricate the balls by putting a drop of oil on that covers the ball completely, then working the ball up and down by prodding it with something (eg a torx key) or depressing it with pliers. With any luck you see bubbles of air emerging which means...
by Samuel D
23 May 2019, 6:15pm
Forum: Bikes & Bits – Technical section
Topic: Dented frame repair
Replies: 25
Views: 878

Re: Dented frame repair

That adds character! Honestly. I wouldn’t spend more than a tenner fixing that.

Your bicycle will develop other signs of use with use, too. Pointless to pretend it isn’t used.
by Samuel D
17 May 2019, 12:02pm
Forum: Cycling Goods & Services - Your Reviews
Topic: Spa Cycles (Harrogate)
Replies: 567
Views: 332586

Re: Spa Cycles (Harrogate)

Maybe they are reamed in Taiwan, I don’t know. The frame manufacturer is sloppy in another way: the tubes are not perfectly rotated before welding. So, for example, the drilled holes in the bottom bracket shell are not centred on the ends of the down tube and seat tube. Both my frames were like that...
by Samuel D
17 May 2019, 10:58am
Forum: Cycling Goods & Services - Your Reviews
Topic: Spa Cycles (Harrogate)
Replies: 567
Views: 332586

Re: Spa Cycles (Harrogate)

On the bad side, my second Spa Audax frame has the same problem as the first: the seatpost slides down. I noticed this with the brand new frame before any corrosion could affect things, so this time I know it to be the case. The seat tube was reamed too large by about 0.1 mm as far as I can tell wit...
by Samuel D
17 May 2019, 10:50am
Forum: Bikes & Bits – Technical section
Topic: pulley wear; is this a record?
Replies: 17
Views: 973

Re: pulley wear; is this a record?

Was there anything left of the bushings on which the pulleys spin?
by Samuel D
16 May 2019, 11:04pm
Forum: Bikes & Bits – Technical section
Topic: Rims with decent braking surface thickness?
Replies: 111
Views: 7801

Re: Rims with decent braking surface thickness?

Open elite is the replacement for the Open Sport which in turn was the replacement for the MA3; all share a similar extrusion design and ERD value. BITD when they didn't machine them so much these rims weighed nearly 500g. Right. And even the machined Open Elite is specified by Mavic to weigh 490 g...
by Samuel D
15 May 2019, 11:08pm
Forum: Does anyone know … ?
Topic: Side Pull Brakes Upgrade
Replies: 8
Views: 427

Re: Side Pull Brakes Upgrade

I hadn’t even noticed that Dia-Compe was single pivot. Just saw the brand, reach, and price. I agree a dual-pivot brake would improve your odds of getting a strong brake.
by Samuel D
15 May 2019, 10:58pm
Forum: Does anyone know … ?
Topic: Side Pull Brakes Upgrade
Replies: 8
Views: 427

Re: Side Pull Brakes Upgrade

SJS Cycles has a few long-drop options among listed among the calliper brakes. You’d need to know the drop you need before choosing one. Something like this might fit the bill. Easily half of your braking power may be wasted by the old (rusty? Dirty? Dry as a bone?) cable housings and cables, howeve...
by Samuel D
15 May 2019, 10:39pm
Forum: Bikes & Bits – Technical section
Topic: Rims with decent braking surface thickness?
Replies: 111
Views: 7801

Re: Rims with decent braking surface thickness?

The last Mavic Open Elite, 32-hole, silver rim I built up weighed 449.9 g on my calibrated balance. That’s by far the lightest I’ve seen. The walls were down to about 1.3 mm in places. Additionally the valve hole wasn’t drilled all the way through so I couldn’t fit a tube before taking a drill to it...