Search found 834 matches

by jb
22 Apr 2019, 9:30am
Forum: Bikes & Bits – Technical section
Topic: Derailleur Hanger alignment tool ?
Replies: 45
Views: 1190

Re: Derailleur Hanger alignment tool ?

On a mech. with a high range of gears resulting in a large 90 degree swivel of the cage it's theoretically possible for a mech that is aligned properly when the cage is vertical to be slightly miss aligned when its horizontal, if the hanger is not quite straight or twisted slightly. However I'm not ...
by jb
17 Apr 2019, 11:06pm
Forum: Bikes & Bits – Technical section
Topic: Derailleur Hanger alignment tool ?
Replies: 45
Views: 1190

Re: Derailleur Hanger alignment tool ?

Two straight flat bars (approx.150x25x6 or 3) with a 10mm hole in one end and 10mm threaded bar with nuts and washers will do the trick, oh and a bolt that will pass through the drop-out derailleur hole. One bar fastened vertically in the drop out, one bar bolted to the hanger, bend hanger with adju...
by jb
16 Apr 2019, 10:30pm
Forum: The Tea Shop
Topic: Funniest clean joke I've heard recently
Replies: 295
Views: 30862

Re: Funniest clean joke I've heard recently

I wanted to buy something special for my nephews Christening,
so I thought of a personalised number plate for when he gets older
but I don't have much money -
so I got them to name him PW16 DTH
I told them it was Welsh...
by jb
16 Apr 2019, 9:40pm
Forum: Bikes & Bits – Technical section
Topic: Can you transfer a Rohlaff hub?
Replies: 5
Views: 290

Re: Can you transfer a Rohlaff hub?

Providing its the disc brake type it should transfer and any of the different types of torque arm should be easily available from SJS.
It will be up to you what type of changer you want for the drops though.
by jb
18 Mar 2019, 10:31pm
Forum: Bikes & Bits – Technical section
Topic: To lube or not to lube?
Replies: 21
Views: 2674

Re: To lube or not to lube?

The weakness in the cup & cone bottom bracket apart from the non existent seals, is that its always tricky to have different hardness qualities in the same lump of metal - the crank needing to be tough whilst the ball races needed to be hard. So unless the very best axles where bought it wasn't ...
by jb
14 Feb 2019, 8:53pm
Forum: Bikes & Bits – Technical section
Topic: Shimano Alfine 11 - Longer term reliability
Replies: 722
Views: 145062

Re: Shimano Alfine 11 - Longer term reliability

If it was supposed to be hand tight it would be knurled for hands to grip. As it is its smooth with recesses for the correct tool.
Its job is to stop oil getting out the A8 is grease...
by jb
13 Feb 2019, 9:08pm
Forum: Bikes & Bits – Technical section
Topic: Suspesion fluid advice
Replies: 3
Views: 637

Re: Suspesion fluid advice

Thanks Chaps. I've used the last of the Fox 7wt oil filling it and all seems fine there certainly doesn't feel like much resistance and the knob that's supposed to close of the ports is ineffective until the last notch when it stops things completely. Maybe its different at normal speeds. Best to re...
by jb
12 Feb 2019, 9:27pm
Forum: Bikes & Bits – Technical section
Topic: Suspesion fluid advice
Replies: 3
Views: 637

Suspesion fluid advice

I have some Roxshox forks requiring 5wt suspension oil but I have some Fox 7wt oil. Will there be any noticeable difference or is this too close to bother about?
by jb
6 Jan 2019, 7:01pm
Forum: Bikes & Bits – Technical section
Topic: Mechanical advantage is doing my head in!
Replies: 7
Views: 490

Re: Mechanical advantage is doing my head in!

The nearer the straddle wire is to a straight line the more force is transmitted to the cantilevers, you will find if you look carefully that the movement of the block is actually a lot less than the vertical movement of the wire. An infinitely long wire on the other hand, will pull the cantilever s...
by jb
29 Dec 2018, 10:49am
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7171

Re: Dynamo Lighting - fit and forget?

Ah, I was confused as there is nothing in a hub generator apart from the windings - but if I understand correctly, it's the winding configuration that limits the output current?
by jb
29 Dec 2018, 10:03am
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7171

Re: Dynamo Lighting - fit and forget?

Wouldn't the transistor put it into a dead short when switched on?
by jb
12 Dec 2018, 8:51pm
Forum: Does anyone know … ?
Topic: Wheelbarrow inner tube 4/4.8 -8
Replies: 41
Views: 1353

Re: Wheelbarrow inner tube 4/4.8 -8

Buy a new wheelbarrow The builders type are usually cheaper than fixing them.
by jb
12 Dec 2018, 8:44pm
Forum: Bikes & Bits – Technical section
Topic: The whole CO2 inflator thing
Replies: 142
Views: 5341

Re: The whole CO2 inflator thing

For the amount of punctures that actually happen these days and the advance in pump technology, a pump spare tube & a patch kit, should be all that's necessary.
All the rest is propaganda, to quote a famous film.
by jb
10 Dec 2018, 8:06pm
Forum: Bikes & Bits – Technical section
Topic: The whole CO2 inflator thing
Replies: 142
Views: 5341

Re: The whole CO2 inflator thing

Hmm, punctures may well be rare these days but when they do come there can be problems. That tube you've had in the bag six years blows it's valve off. You thought you'd got the rascal out but ten yards down the road it's flat again. The beads somehow manages to not be straight so you have to let so...
by jb
10 Dec 2018, 7:50pm
Forum: Bikes & Bits – Technical section
Topic: Never using an adjustable torque wrench again!
Replies: 66
Views: 2808

Re: Never using an adjustable torque wrench again!

Of course, tightening a quality bolt into aluminium will most likely pull the threads out the aluminium long before damaging the bolt. Which is why you should read the manufactures recommendations, and not work on the bolts theoretical torque setting.