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Search: Posts Made By: grumpus
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
05-09-24, 05:20 AM
Replies: 58
Views: 1,189
Posted By grumpus

The easy solution to that is a VPN that lets you...

The easy solution to that is a VPN that lets you select endpoints in different countries.
Forum: Bicycle Mechanics
05-09-24, 04:55 AM
Replies: 58
Views: 883
Posted By grumpus

https://www.amazon.com/VAR-Nylon-Tire-Lever-System...

https://www.amazon.com/VAR-Nylon-Tire-Lever-System/dp/B004YJ30M8/
Forum: Bicycle Mechanics
05-07-24, 02:50 PM
Replies: 32
Views: 661
Posted By grumpus

OTOH they sell chains, but OTOH they sell user...

OTOH they sell chains, but OTOH they sell user experience ...
Forum: Bicycle Mechanics
05-07-24, 01:08 PM
Replies: 58
Views: 1,189
Posted By grumpus

Looks like a flat spot rather than a hop, I used...

Looks like a flat spot rather than a hop, I used to regularly fix these with a rubber hammer - just remove the surrounding spokes and beat it back into shape - but I've never tried it on a deep...
Forum: Bicycle Mechanics
05-07-24, 12:24 PM
Replies: 14
Views: 281
Posted By grumpus

I suspect this bike was also available with a...

I suspect this bike was also available with a rear hub motor. I recently worked on a rear hub motor that's spaced 142 mm with a regular threaded axle.
Forum: Bicycle Mechanics
05-07-24, 11:58 AM
Replies: 16
Views: 334
Posted By grumpus

I wouldn't ride those any further than I minded...

I wouldn't ride those any further than I minded walking home. These https://www.ebay.co.uk/itm/313181080692 are really good value if you're on 25-622.
Forum: Bicycle Mechanics
05-07-24, 10:28 AM
Replies: 30
Views: 517
Posted By grumpus

Not with those patches, just sand the area around...

Not with those patches, just sand the area around the hole, apply the patch and press firmly, with luck it will get you home (I've heard Slime patches are as mediocre as Slime sealant). For proper...
Forum: Bicycle Mechanics
05-07-24, 10:13 AM
Replies: 58
Views: 883
Posted By grumpus

I've never offered tube patching as a service...

I've never offered tube patching as a service when working in shops, only fitted a new tube. At the co-op where my time was free and new tubes were not I would occasionally patch a tube.
Forum: Bicycle Mechanics
05-07-24, 10:02 AM
Replies: 58
Views: 883
Posted By grumpus

QuikStik?

QuikStik?
Forum: Bicycle Mechanics
05-07-24, 09:53 AM
Replies: 58
Views: 883
Posted By grumpus

As I wrote, that's fine for most tyre/rim...

As I wrote, that's fine for most tyre/rim combinations ...
Forum: Bicycle Mechanics
05-07-24, 09:52 AM
Replies: 58
Views: 883
Posted By grumpus

You can fire 1/4" BBs at bike boxes really fast...

You can fire 1/4" BBs at bike boxes really fast with an air compressor ...
Forum: Bicycle Mechanics
05-07-24, 09:40 AM
Replies: 58
Views: 883
Posted By grumpus

It's often not so difficult once the tyre has had...

It's often not so difficult once the tyre has had some use, but I did have one set that I made sure to carry metal levers if I was going far from home.
Forum: Bicycle Mechanics
05-07-24, 09:37 AM
Replies: 58
Views: 883
Posted By grumpus

That's fine for most tyre/rim combinations but...

That's fine for most tyre/rim combinations but occasionally levers make a difficult job a lot easier; of course you have to be careful not to damage anything.
Forum: Bicycle Mechanics
05-07-24, 09:11 AM
Replies: 84
Views: 2,277
Posted By grumpus

Spooky.

Spooky.
Forum: Bicycle Mechanics
05-05-24, 04:35 PM
Replies: 8
Views: 176
Posted By grumpus

If ever you're not sure, remove the bolt and...

If ever you're not sure, remove the bolt and washer and look for the groove the cable should locate in. You'll not always be able to tell, particularly if the cable has been fitted in the wrong...
Forum: Bicycle Mechanics
05-05-24, 04:03 PM
Replies: 15
Views: 313
Posted By grumpus

I recently had to fit spacers to stop a...

I recently had to fit spacers to stop a derailleur mounting bolt from hitting the chain on the smallest sprocket - 10 x 16 x 1 mm stainless washers from Amazon made a neat job of it, and would also...
Forum: Bicycle Mechanics
05-05-24, 02:31 PM
Replies: 9
Views: 267
Posted By grumpus

I wouldn't use Velox on a tubeless ready rim, the...

I wouldn't use Velox on a tubeless ready rim, the bed is shaped and the tape wouldn't conform. Is there any reason not to use tubeless tape? Maybe a double layer if you're going to be running higher...
Forum: Bicycle Mechanics
05-05-24, 09:59 AM
Replies: 39
Views: 901
Posted By grumpus

Sounds like you're not cleaning the chain...

Sounds like you're not cleaning the chain internals, so as soon as you oil it and ride it some of the residue is floating out on the clean oil. My chain cleaning routine: remove, soak and shake in a...
Forum: Bicycle Mechanics
05-05-24, 09:33 AM
Replies: 84
Views: 2,277
Posted By grumpus

I did know someone whose front wheel locked up...

I did know someone whose front wheel locked up because a bit of tar-coated gravel jammed under his mudguard, they were those narrow flat aluminium close clearance guards that were popular in the late...
Forum: Bicycle Mechanics
05-05-24, 09:21 AM
Replies: 27
Views: 641
Posted By grumpus

So did you try actually using the pedals? Some...

So did you try actually using the pedals? Some that I use have only a small ball bearing at the outer end to locate the body on the spindle - the main load is taken by a plastic bushing and it feels...
Forum: Bicycle Mechanics
05-05-24, 07:46 AM
Replies: 39
Views: 694
Posted By grumpus

135 mm is MTB spacing - if it's now a road bike...

135 mm is MTB spacing - if it's now a road bike just bend it slightly so it's 130 mm wide, it's steel so it's fine to do that.
Forum: Bicycle Mechanics
05-05-24, 05:57 AM
Replies: 20
Views: 713
Posted By grumpus

I suspect under-inflation may be a significant...

I suspect under-inflation may be a significant factor when tube damage occurs.
Forum: Bicycle Mechanics
05-04-24, 04:53 PM
Replies: 20
Views: 713
Posted By grumpus

That doesn't look much better than the other one...

That doesn't look much better than the other one - tyres degrade with time, regardless of how worn the tread is, and this one appears to have some bead damage too.
Forum: Bicycle Mechanics
05-03-24, 11:03 AM
Replies: 39
Views: 1,020
Posted By grumpus

Some product may be out of tolerance due to...

Some product may be out of tolerance due to ineffective QC?
Forum: Bicycle Mechanics
05-03-24, 10:57 AM
Replies: 20
Views: 713
Posted By grumpus

I've sanded a taper in the overlapping parts and...

I've sanded a taper in the overlapping parts and rounded the corners, but if it's TPU you might be able to weld the ends together - making it endless would remove the problem (but make it harder to...
Forum: Bicycle Mechanics
05-03-24, 10:36 AM
Replies: 20
Views: 359
Posted By grumpus

There's history for steering stops on bikes, but...

There's history for steering stops on bikes, but this was usually just an attachment or protrusion on the fork crown that hit a stop on the frame. Newer utility bikes or cruisers often have a spring...
Forum: Bicycle Mechanics
05-02-24, 01:27 PM
Replies: 20
Views: 713
Posted By grumpus

No, it definitely was not still usable - if the...

No, it definitely was not still usable - if the carcass is distorted the tyre is garbage, the threads that hold it together are broken, and more will follow. The threads wrap around the steel bead to...
Forum: Bicycle Mechanics
05-02-24, 01:05 PM
Replies: 84
Views: 2,277
Posted By grumpus

I wonder what would happen if you could place a...

I wonder what would happen if you could place a sliver of shim under the front of the brake bolt, and another over the back of it, or even just wedge something under the brake as you tighten its...
Forum: Bicycle Mechanics
05-02-24, 12:27 PM
Replies: 11
Views: 1,136
Posted By grumpus

You're replying to someone who hasn't posted in...

You're replying to someone who hasn't posted in 22 years.
Forum: Bicycle Mechanics
05-02-24, 11:16 AM
Replies: 20
Views: 713
Posted By grumpus

It's a wide tube, it will patch just fine with a...

It's a wide tube, it will patch just fine with a large patch as long as it's properly prepared.
Forum: Bicycle Mechanics
05-02-24, 11:12 AM
Replies: 20
Views: 713
Posted By grumpus

Looks like a typical unseated bead blowout - the...

Looks like a typical unseated bead blowout - the tyre wasn't fitted straight, the bike was left under hot sun and pressure rose to the point the tube escaped. Tire liners can cause as many problems...
Forum: Bicycle Mechanics
05-02-24, 10:51 AM
Replies: 14
Views: 443
Posted By grumpus

Traditional road bars are 26.0 mm in the centre...

Traditional road bars are 26.0 mm in the centre (except older Cinelli 26.4, some 3TTT 26.2) and 15/16" (23.8 mm) on the grip area. Newer bars are 31.8 in the clamp area. Somewhere in between those...
Forum: Bicycle Mechanics
05-01-24, 02:21 PM
Replies: 38
Views: 989
Posted By grumpus

I think it might vary a lot depending on where...

I think it might vary a lot depending on where the mechanic worked - Germans use dynamo hubs (they have mandated effective lighting too - it's almost as if they think bicycles are proper road...
Forum: Bicycle Mechanics
05-01-24, 01:10 PM
Replies: 38
Views: 989
Posted By grumpus

Whether or not you were aware of rim wear...

Whether or not you were aware of rim wear happening or not in places that you worked, it definitely does happen to the extent that rims require replacement on a regular basis for some higher mileage...
Forum: Bicycle Mechanics
05-01-24, 05:58 AM
Replies: 10
Views: 204
Posted By grumpus

If it's nice quality and a bit different maybe...

If it's nice quality and a bit different maybe it's worth a little inconvenience - perhaps not something for your commuter, but a definite maybe for one of the Sunday bikes. Support and spares aren't...
Forum: Bicycle Mechanics
04-30-24, 01:09 PM
Replies: 8
Views: 240
Posted By grumpus

Did you tighten the chainring bolts?

Did you tighten the chainring bolts?
Forum: Bicycle Mechanics
04-30-24, 01:03 PM
Replies: 38
Views: 989
Posted By grumpus

Some rims are skimmed on the braking surface so...

Some rims are skimmed on the braking surface so the coating doesn't interfere with braking, and to make the rim surfaces more precisely parallel, some rims are lightly grooved which increases brake...
Forum: Bicycle Mechanics
04-29-24, 08:30 PM
Replies: 13
Views: 286
Posted By grumpus

Indeed, but to me it looks a bit close to the...

Indeed, but to me it looks a bit close to the bead to be brake block rub, and the OP stated the blocks aren't near the tyre. Of course the brake could be flexing enough that the block contacts the...
Forum: Bicycle Mechanics
04-29-24, 08:19 PM
Replies: 20
Views: 360
Posted By grumpus

Ammonia solution as used for domestic cleaning is...

Ammonia solution as used for domestic cleaning is supposed to be the magical elixir for this, I've never tried it myself.
Forum: Bicycle Mechanics
04-29-24, 08:03 PM
Replies: 13
Views: 286
Posted By grumpus

Rim brake? I'd suspect the rim is getting hot,...

Rim brake? I'd suspect the rim is getting hot, and the bit with best contact, the bead hook, is softening the rubber and digging into it. But rail trails shouldn't do that, even on a heavy tandem. If...
Forum: Bicycle Mechanics
04-29-24, 11:33 AM
Replies: 6
Views: 167
Posted By grumpus

I wouldn't worry about it as long the chain stays...

I wouldn't worry about it as long the chain stays on the ring, which it probably will (if there are bent or ragged bits you can straighten and smooth them, if the ring is actually warped you will...
Forum: Bicycle Mechanics
04-29-24, 11:18 AM
Replies: 8
Views: 231
Posted By grumpus

What a bodge to circumvent something that is...

What a bodge to circumvent something that is intended to make fender mounting neater. A little hole isn't going to make a fender useless on other bikes.
Forum: Bicycle Mechanics
04-29-24, 11:02 AM
Replies: 38
Views: 989
Posted By grumpus

Really? You can pretty much do that by sticking...

Really? You can pretty much do that by sticking abrasive paper to your brake blocks and coasting down a hill. Then clean the rim with IPA. Or just the IPA will probably work fine. Truing doesn't...
Forum: Bicycle Mechanics
04-29-24, 10:36 AM
Replies: 10
Views: 204
Posted By grumpus

This...

This (https://www.sicklines.com/tech/howto/hadleyoverhaul/) no good?
Forum: Bicycle Mechanics
04-28-24, 09:27 PM
Replies: 8
Views: 231
Posted By grumpus

I have a bike like that - the fender is fixed by...

I have a bike like that - the fender is fixed by drilling a 5 mm hole and screwing it directly to the threaded hole in the frame, you don't use the adjustable bridge that comes with the fender.
Forum: Bicycle Mechanics
04-28-24, 08:14 PM
Replies: 59
Views: 8,194
Posted By grumpus

It's not hard to re-space old steel frames, the...

It's not hard to re-space old steel frames, the rack wouldn't make it difficult, you just have to take care that you bend both sides equally, and check/adjust dropout alignment when you're done.
Forum: Bicycle Mechanics
04-28-24, 02:10 PM
Replies: 8
Views: 219
Posted By grumpus

They were wrong - V-brakes are more idiot-proof...

They were wrong - V-brakes are more idiot-proof than cantilever brakes, but they're not inherently superior.
Yes, you need direct-pull levers to match the brake arms, they pull more cable than...
Forum: Bicycle Mechanics
04-28-24, 01:57 PM
Replies: 18
Views: 477
Posted By grumpus

I recently binned a couple of Marathons that...

I recently binned a couple of Marathons that looked like they were ready to fail at the bead, very few signs of wear otherwise but I know they were a few years old.
Forum: Bicycle Mechanics
04-28-24, 01:32 PM
Replies: 59
Views: 8,194
Posted By grumpus

That's a nice build, but I would have just spread...

That's a nice build, but I would have just spread the frame to 130 or 135 mm and used a regular hub.
Forum: Bicycle Mechanics
04-28-24, 12:30 PM
Replies: 16
Views: 405
Posted By grumpus

Ashtabula crank, the grooved part is the...

Ashtabula crank, the grooved part is the adjusting cone and has a left handed thread, the normal way to turn it is with a flat blade screwdriver, it's only hand tight until you tighten the lock nut...
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