Search found 32294 matches

by Brucey
6 Feb 2012, 4:05pm
Forum: Bikes & Bits – Technical section
Topic: Dumb chain question
Replies: 57
Views: 1981

Re: Dumb chain question

I'm glad we are having this discussion even if it is mainly showing that not all 'n-speed' chains are the same. And actually the spectrum of chains being looked at is usefully wide; I have a few sram and shimano ones, plus one or two others but no campy ones right now. Thinking about it the minimum ...
by Brucey
6 Feb 2012, 2:49pm
Forum: Bikes & Bits – Technical section
Topic: Dumb chain question
Replies: 57
Views: 1981

Re: Dumb chain question

thanks chaps for chipping in measurements, all very interesting and useful. I thought about using a mic too but even some new chainrings have tiny burrs on them so after a few goes I went back to the digital verniers. I like the idea of using a mic as a go\no-go gauge for tooth thickness (even if it...
by Brucey
5 Feb 2012, 8:45pm
Forum: Bikes & Bits – Technical section
Topic: Nexus Hubs - Is there a(n easy) way to 'oil' the freewheel
Replies: 27
Views: 1564

Re: Nexus Hubs - Is there a(n easy) way to 'oil' the freewhe

I believe that if you are happy to undo all the gubbins on the left side the entire 'centre' will emerge and you can look at it, lube it etc. So if you are happy to remove the brake and adjust the hub bearings etc you are 85% of the way to getting full access as it were. IIRC there are some write-up...
by Brucey
5 Feb 2012, 8:34pm
Forum: Bikes & Bits – Technical section
Topic: Dumb chain question
Replies: 57
Views: 1981

Re: Dumb chain question

sorry Mick but I think you either have a burr (quite likely) or your measuring is off some other way; using verniers isn't that easy... I've seen four different people measure things and get different answers before now.. I usually have to repeat a measurement several times and even use several sets...
by Brucey
5 Feb 2012, 3:23pm
Forum: Bikes & Bits – Technical section
Topic: Dumb chain question
Replies: 57
Views: 1981

Re: Dumb chain question

Am I really the only one who has a working set of vernier calipers and is prepared to use them? No. They are steel Biopace SG and my calipers show 2.15mm. thanks; if so, that makes them the widest chainrings yet, certainly the widest to run a 9 speed chain on happily. I've just measured some of my ...
by Brucey
5 Feb 2012, 12:09pm
Forum: Bikes & Bits – Technical section
Topic: Dura ace bar end shifters
Replies: 13
Views: 785

Re: Dura ace bar end shifters

shibster, what parts are you trying to make work together?

if you are baking a cake you might be doing it wrong but if you have a mismatched set of ingredients it doesn't matter how well you do it, it'll taste terrible...

cheers
by Brucey
5 Feb 2012, 12:06pm
Forum: Bikes & Bits – Technical section
Topic: Dumb chain question
Replies: 57
Views: 1981

Re: Dumb chain question

but how wide are your chainrings ? If they are the first biopace mark 1 aluminium then they were sold with 6 speed but later biopace mark 1 and biopace II ('biopace SG' IIRC) were 7/8 speed compatible, even though they were also routinely fitted on bikes that were 6-speed equipped. Biopace steel ri...
by Brucey
5 Feb 2012, 10:03am
Forum: Bikes & Bits – Technical section
Topic: 21" Frame what wheels
Replies: 7
Views: 370

Re: 21" Frame what wheels

need to know the distance from the brake mountings to the dropout centres.

Frame size says nothing about wheel size to go into frame; lots of different wheel sizes....

cheers
by Brucey
5 Feb 2012, 10:00am
Forum: Bikes & Bits – Technical section
Topic: Dura ace bar end shifters
Replies: 13
Views: 785

Re: Dura ace bar end shifters

chaps, until the OP says what bits he has, are we not merely speculating as to which of the many hundreds of possible problems he might have?

cheers
by Brucey
5 Feb 2012, 9:56am
Forum: Bikes & Bits – Technical section
Topic: Dumb chain question
Replies: 57
Views: 1981

Re: Dumb chain question

normally they are paralell-sided where the chain inner side plates slip over, but are as you say tapered above that near the very tip of the tooth. However some recent shimano ones (and maybe others for all I know) are made with a taper that extends the full height of the tooth. In fact they look 'w...
by Brucey
5 Feb 2012, 9:41am
Forum: Bikes & Bits – Technical section
Topic: Spray-on snow chain tyre grip stuff
Replies: 10
Views: 1353

Re: Spray-on snow chain tyre grip stuff

studs and snow chains might get you, I dunno, to maybe 25 or 50% of 'normal' grip levels. 'up to 300%' means they got a x3 improvement, once maybe, during their tests. Sounds impressive, huh... Well if you started with 1% of normal grip and did the best you could and got to the giddy heights of 3% i...
by Brucey
5 Feb 2012, 9:04am
Forum: Bikes & Bits – Technical section
Topic: Spray-on snow chain tyre grip stuff
Replies: 10
Views: 1353

Re: Spray-on snow chain tyre grip stuff

its a bit like the 'does having treaded tyres make much difference on slippy white lines' discussion; well it might make for half as much grip again but it is still next to nothing..... BTW I've sen people make things fitted over their wellies out of chicken wire; I wonder if you could make snow cha...
by Brucey
5 Feb 2012, 8:54am
Forum: Bikes & Bits – Technical section
Topic: Dura ace bar end shifters
Replies: 13
Views: 785

Re: Dura ace bar end shifters

many different flavours of dura-ace bar end levers, XT mechs and # of index positions. Need to know which model of each, how many gears you are going for etc.

Only common theme is that most XT mechs have the same throw (apart I think from 10-speed ones....)

cheers
by Brucey
4 Feb 2012, 10:02pm
Forum: Bikes & Bits – Technical section
Topic: Economy non-knobblies
Replies: 21
Views: 1137

Re: Economy non-knobblies

pretty much, yes, but it depends how much weight you put over the front end I guess.... Only downside to semislicks is the 'iffy' cornering behaviour when you get leant over...

cheers
by Brucey
4 Feb 2012, 8:08pm
Forum: Bikes & Bits – Technical section
Topic: Economy non-knobblies
Replies: 21
Views: 1137

Re: Economy non-knobblies

a 'semi-slick' then. Can be bought, can be made.... this is how worn-out knobblies end up all by themselves, can be speeded up greatly by suitable application of angle grinder....

:shock:

cheers