Search found 14 matches

by Biketyke
26 May 2020, 11:00am
Forum: Bikes & Bits – Technical section
Topic: Compact double to triple conversion
Replies: 13
Views: 506

Re: Compact double to triple conversion

Gear ratios seem to be far too high these days. Perhaps there is some justification for competition riding, 40mph pro sprint finishes. In 1988 I bought a Raleigh Road Ace, which was their top, off the peg road bike. It was fitted with the a 52 x 13 top gear, standard at the time. A 44 x 11 is exactl...
by Biketyke
26 May 2020, 10:10am
Forum: Bikes & Bits – Technical section
Topic: Lower gears - Campagnolo 10 speed
Replies: 20
Views: 867

Re: Lower gears - Campagnolo 10 speed

Thanks for your answer PWA. I have used the B screw on Shimano mechs before but the bike has a Chorus rear mech which does not have a B screw. The riding jockey wheel is no longer an issue due to not using the full range of the mech now that the large ring is a 44 tooth. The chain has been cut short...
by Biketyke
25 May 2020, 9:48pm
Forum: Bikes & Bits – Technical section
Topic: Lower gears - Campagnolo 10 speed
Replies: 20
Views: 867

Re: Lower gears - Campagnolo 10 speed

I had been using 48x39x28 successfully with 12-30 cassette. The only issue that I had was that as the chain wore and lengthened, the jockey wheel would ride on the 30 sprocket giving a rumbling noise in the lowest gear. Keeping the chain as short as possible keeps the jockey wheel away from the spro...
by Biketyke
3 Dec 2014, 6:52pm
Forum: Does anyone know … ?
Topic: Fixed for the first time
Replies: 12
Views: 1154

Re: Fixed for the first time

I have ridden for many years on fixed especially for commuting and found SPDs to be a great advantage over flat pedals. However for the first few rides using flat pedals with no toe clips or just flat shoes on SPDs is a wise move. It will give you time to get used to the feel of it but able to quick...
by Biketyke
14 Jan 2014, 10:06pm
Forum: Bikes & Bits – Technical section
Topic: Ergo woes
Replies: 32
Views: 6822

Re: Ergo woes

Had a similar problem myself after re-taping the bars. Discovered that the button was being held slightly depressed by the tape distorting the rubber hood on the lever. Could operate the lever by manually lifting the button then the paddle would work. final solution was to sort the bar tape. Might b...
by Biketyke
28 Nov 2012, 10:26pm
Forum: On the road
Topic: How do I handle a large, busy roundabout?
Replies: 20
Views: 2930

Re: How do I handle a large, busy roundabout?

I cross this roundabout every day. The left turn only lane is only two or three car lengths long and usually blocked by the standing traffic behind so there isn't a stream of traffic flowing through it. Also any vehicles in this lane are usually waiting at the give way line ready to go and well over...
by Biketyke
14 Jul 2012, 10:29pm
Forum: Bikes & Bits – Technical section
Topic: Carradice cotton duck
Replies: 20
Views: 1892

Re: Carradice cotton duck

There is an interview with the owner of Carridice on "The bike show" podcast from Resonance FM dated 28 Nov 2011. The "duck" part of cotton duck refers to the square weave which is especially waterproof.
by Biketyke
4 Feb 2012, 8:54pm
Forum: Bikes & Bits – Technical section
Topic: ADVICE ON HOW TO HARDEN STEEL, PLEASE?
Replies: 20
Views: 1779

Re: ADVICE ON HOW TO HARDEN STEEL, PLEASE?

You could make a punch out of an old or broken thread tap. They are made from high speed steel and work a treat as centre punches so should do for your application.
by Biketyke
4 Feb 2012, 8:26pm
Forum: Bikes & Bits – Technical section
Topic: Garmin alternatives to the Edge 800 GPS
Replies: 47
Views: 4666

Re: Garmin alternatives to the Edge 800 GPS

I have an ETREX Legend HCx which has served me well. It has 20 routes capabilty. Each route averages a max of about 300 km, so about 6000 km available. It uses 2 AA batteries. I usually use rechargeables but on tour carry alkaline batteries. In summer temperatures each set lasts for 3 full days tour...
by Biketyke
4 Mar 2010, 1:29pm
Forum: Bikes & Bits – Technical section
Topic: Is this the end for my faithful Dawes Galaxy?
Replies: 32
Views: 2275

Re: Is this the end for my faithful Dawes Galaxy?

That is a classic fatigue failure due to torsional loading. Each time you push on a pedal the down tube is twisted first one way then the other. The alignment of the cracks at 45deg is just what you would expect with a torsional load failure of the tube. A couple of observations. Fixed gear bike, ma...
by Biketyke
28 Feb 2010, 12:59am
Forum: Bikes & Bits – Technical section
Topic: Worn chain
Replies: 50
Views: 3956

Re: Worn chain

Chains when new are subject to manufacturing tolerance. As they are made of many parts and critically the centre distance between the holes in the side plates and the clearance between the pins and holes in the inner chain sections govern the final length. For 36" or 72 pitches a 1/16" tol...
by Biketyke
27 Feb 2010, 10:37pm
Forum: Bikes & Bits – Technical section
Topic: Worn chain
Replies: 50
Views: 3956

Re: Worn chain

You should expect an initial increased change in the length of the chain for the first few miles. This being the running in period where the high spots from machining the individual parts are worn down to a more polished finish. After the initial running in period the wear rate will settle down to t...
by Biketyke
25 Feb 2010, 11:22pm
Forum: Bikes & Bits – Technical section
Topic: Indexing an 11-34 cassette - has anyone got it to work?
Replies: 33
Views: 2222

Re: Indexing an 11-34 cassette - has anyone got it to work?

Have you checked for wear in the jockey wheel bushes. Once these wear the jockey wheels rocks sideways. This has the effect of allowing the changer to move without it actually pushing the chain sideways sufficiently to change gear. Hence you have to over compensate to instigate a gear change. You ma...
by Biketyke
20 Feb 2010, 9:12am
Forum: Bikes & Bits – Technical section
Topic: Dynamo wiring concealed in frame
Replies: 7
Views: 1961

Re: Dynamo wiring concealed in frame

The solution I came up with is to epoxy glue some small 1/4" lengths of brass tubes to the underside of the down tube for threading the wire through. The frame looks neater without the tiewraps. I use black wire which does not stand out too much against the frame. Brass tube can be bought from ...