Search found 44397 matches

by Brucey
28 Mar 2024, 8:36pm
Forum: Bikes & Bits – Technical section
Topic: Tips for fitting tyres to WH-6800 rims?
Replies: 4
Views: 190

Re: Tips for fitting tyres to WH-6800 rims?

it is certainly best if you finish at the valve as previously suggested. Some rim/tyre combinations have been so bad they have made my thumbs sore, but I have seldom failed.
by Brucey
28 Mar 2024, 8:09pm
Forum: Bikes & Bits – Technical section
Topic: Dynamo carbon fork mounting options
Replies: 12
Views: 509

Re: Dynamo carbon fork mounting options

it should be possible to create a wire bracket that mounts with an M5 bolt on the back of the fork crown.

My suggestion is that you make a four-legged bracket as per my previous post, but you make it so that two legs go under the fork crown, and two go over it. I think it would be best done with the two sides having one leg of each sort. Again, an additional modified 'V'-brake washer could be used, this time to secure the ends of the bracket legs. If the legs are fitted with a few of those protector 'o' rings as seen on many mtb top tube cable runs (or similar), it ought to be possible to make the bracket so that it is partially supported by the fork crown but the fork is not marred by it.
by Brucey
28 Mar 2024, 6:38pm
Forum: Bikes & Bits – Technical section
Topic: Vitus escarpe 2018 27.5 inch seat stay/chain stay
Replies: 1
Views: 74

Re: Vitus escarpe 2018 27.5 inch seat stay/chain stay

I would wager that it can be repaired, and in fact if you can't buy replacement parts, you have little choice. However, more details of this allegedly 'unrepairable' part would be useful.
by Brucey
28 Mar 2024, 6:07pm
Forum: Bikes & Bits – Technical section
Topic: Tiagra ST-4703 Shifter Not Working
Replies: 19
Views: 606

Re: Tiagra ST-4703 Shifter Not Working

when I rode with my chum, it soon became clear that he changed gear at least ten times more often than I did. I guess that is what many years of riding a SA 5s hub does for you. To give you some idea, I worked out that you could nigh-on replicate the gear ratios using a derailleur system, but even I was surprised by the result.

If you started with a 7s 13-28T freewheel and simply omitted 3rd and 5th, you would be pretty close. Because the middle gear is
arguably doing the work of three, gear changes on a flattish road with a SA 5s hub can be few and far between.
by Brucey
28 Mar 2024, 1:29pm
Forum: Bikes & Bits – Technical section
Topic: Tiagra ST-4703 Shifter Not Working
Replies: 19
Views: 606

Re: Tiagra ST-4703 Shifter Not Working

Cyclothesist wrote: 28 Mar 2024, 11:05am.... The only trouble I've had is fishing broken gear cable strands out when I've been tardy in replacing them.
Maybe I've been lucky?
things can wear out or break depending on the exact model but by far the most common faults are dried grease and broken cables. Very often shifters don't survive an episode of broken cables, because they get damaged when the broken bits are removed. Needless to say you don't have the same problem if the cable is largely outside the shifter. One of my chums had repeated problems with broken cables inside STIs on his commuting machine. Riding with him, I soon established the reason; he was wont to do many more gear changes than most people,and his gear cables wouldn't last 9 months without fatiguing and breaking. Using him as a guinea pig, I was able to establish that the life expectancy of cables inside STI shifters is typically about 150000 shifts. By routinely changing the cables at about 125000 shifts my chum's problem was almost completely cured.
by Brucey
28 Mar 2024, 11:18am
Forum: Bikes & Bits – Technical section
Topic: M2.5 bolt
Replies: 30
Views: 1055

Re: M2.5 bolt

FWIW a drop of loctite on these screws never hurts.
by Brucey
28 Mar 2024, 10:23am
Forum: Bikes & Bits – Technical section
Topic: Noisy freehub - quieten with grease?
Replies: 35
Views: 1554

Re: Noisy freehub - quieten with grease?

that is pretty much what I'd do anyway tbh
by Brucey
28 Mar 2024, 10:11am
Forum: Bikes & Bits – Technical section
Topic: Tiagra ST-4703 Shifter Not Working
Replies: 19
Views: 606

Re: Tiagra ST-4703 Shifter Not Working

I decided long ago that I preferred not to have STIs and that 'old-fashioned' they might be, but separate gear and brake levers had numerous advantages for me. Accordingly I would take the failure of my left shifter as nature's way of persuading me to do things differently.
by Brucey
27 Mar 2024, 7:51pm
Forum: Bikes & Bits – Technical section
Topic: Custom Storage
Replies: 15
Views: 659

Re: Custom Storage

I would probably make something like a C shape in timber and leave it on the garage floor so that you would have to drive over the long side of the 'C' to get close to the bike. The two short sides of the 'C' shape would hold it away from the end wall. If 4x2" timber is used, you can make it so that it would only be possible to hit a parked bike if you drove over a 4" piece of timber first.
by Brucey
27 Mar 2024, 7:00pm
Forum: Bikes & Bits – Technical section
Topic: Noisy freehub - quieten with grease?
Replies: 35
Views: 1554

Re: Noisy freehub - quieten with grease?

what kind of cycle bell is used for the whatsapp sound? It ought to be possible to differentiate the sound of your bell from this...
by Brucey
27 Mar 2024, 6:14pm
Forum: Bikes & Bits – Technical section
Topic: Front wheel 9mm across flats into 10mm drop outs
Replies: 4
Views: 244

Re: Front wheel 9mm across flats into 10mm drop outs

if the front wheel is properly tightened the 0.5mm gap shouldn't matter. However, this is presumably a motor wheel and there is wheel retention to consider too. All front wheels (on bikes where it might be possible to ride them with the wheels not properly tightened) are now meant to have some form of secondary wheel retention, so that even a loose front wheel can't simply drop out of the bike over a bump.

Now it is entirely up to you if you have a secondary wheel retention system or not but should you ever sell a bike on having disabled it, there could be unfortunate repercussions. FWIW if the 9mm dia. axle is threaded where it passes through the dropouts, it should be possible to make some spacers that are threaded on the inside but are 10mm OD. With a motorised wheel, I much prefer to use a separate torque arm instead of just washers.
by Brucey
27 Mar 2024, 4:36pm
Forum: Bikes & Bits – Technical section
Topic: how slow do they get?
Replies: 17
Views: 1111

Re: how slow do they get?

with presta valves I am happy enough to forgo a front dustcap. However the other valve types have sufficient propensity to leak or get clogged etc. that I regard the secondary seal as more or less essential.
by Brucey
27 Mar 2024, 1:51pm
Forum: Bikes & Bits – Technical section
Topic: Broken Chain! I’m a complete amateur
Replies: 17
Views: 1017

Re: Broken Chain! I’m a complete amateur

NickJP wrote: 27 Mar 2024, 5:36am
Brucey wrote: 26 Mar 2024, 12:16pmSince then I have studiously avoided chain tool use on 9s and higher chains, except for shortening them.
I've had a Rohloff Revolver chain tool for many years. It has a tungsten carbide anvil that peens the end of the joining pin. After driving the joining pin through the chain and snapping off the excess length, you rotate that anvil in line with the pin, lock it down, and then apply considerable force to the other end of the pin to peen the end that's come through the chain so that it can't back out. Until recently, all Shimano chains used the joining pin, even 11s chains, but I haven't had anyone come back to me complaining of a failure at the joining pin after this treatment.
PXL_20240327_050447226.jpg
I am not 100% sure about 12s, but 11s campag chain is meant be joined with a peened rivet. This puts off anybody who is keen on chain waxing.
by Brucey
27 Mar 2024, 1:29pm
Forum: Bikes & Bits – Technical section
Topic: Noisy freehub - quieten with grease?
Replies: 35
Views: 1554

Re: Noisy freehub - quieten with grease?

hoogerbooger wrote: 27 Mar 2024, 9:09am
plancashire wrote: 26 Mar 2024, 9:46pm A noisy freehub can be a useful addition to a bell on shared-use paths, of which we have a lot in Germany. People recognise the sound. Pedal backwards for even more volume.
Or just very irritating when you're out to enjoy the sights and sounds of the countryside.......
I have done a lot of riding on shared use paths in recent years and it is fair to say that hitherto I hadn't really appreciated how useful a good bell could be.
by Brucey
27 Mar 2024, 12:22pm
Forum: Bikes & Bits – Technical section
Topic: Tiagra ST-4703 Shifter Not Working
Replies: 19
Views: 606

Re: Tiagra ST-4703 Shifter Not Working

water only helps corrosion along if it is allowed to linger and/or it is contaminated. It is pretty harmless otherwise.