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Search: Posts Made By: grumpus
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01-27-23, 07:15 PM
Replies: 10
Views: 319
Posted By grumpus

That's why I don't use lock rings on Presta valve...

That's why I don't use lock rings on Presta valve stems - if the tube starts to migrate the stem indicates that by tilting, before any damage occurs. Not so useful with deep section rims, which will...
01-24-23, 01:19 PM
Replies: 25
Views: 672
Posted By grumpus

Looks fine. I'd just listen out for any clicks or...

Looks fine. I'd just listen out for any clicks or creaks that suggest the assembly is moving under high load - you don't want to wear a groove in the handlebar.
01-24-23, 10:37 AM
Replies: 13
Views: 391
Posted By grumpus

That's correct, but before trying to adjust the...

That's correct, but before trying to adjust the bell crank I'd take it off and make sure you actually have three gears by manipulating the shifter rod. If the hub isn't shifting the shifter can't...
01-21-23, 11:10 AM
Replies: 14
Views: 371
Posted By grumpus

I also suggest ear protection when adding...

I also suggest ear protection when adding pressure in excess of the recommended maximum (although manufacturers probably leave a wide safety margin) having been near tyres that went pop quite loudly....
01-17-23, 10:01 AM
Replies: 21
Views: 432
Posted By grumpus

Well yes, I carry pump and CO2 and spare tubes...

Well yes, I carry pump and CO2 and spare tubes and patches. And a Presta Schrader adaptor.

Really? Blown up, not simply blown off through overenthusiastic inflation when they weren't properly...
01-16-23, 03:17 PM
Replies: 25
Views: 550
Posted By grumpus

That's the one you need, but they tend not to...

That's the one you need, but they tend not to work very well particularly if the thread wasn't greased before the freewheel was fitted. Be sure to tighten the axle nut firmly against the tool before...
01-14-23, 03:18 PM
Replies: 30
Views: 635
Posted By grumpus

That looks mint, probably collectable - I'd be...

That looks mint, probably collectable - I'd be inclined to try to sell the bikes and put the proceeds towards more suitable bikes for your clients.

V brake levers won't work properly with old...
Forum: Touring
01-13-23, 12:10 PM
Replies: 27
Views: 725
Posted By grumpus

Indeed - who hasn't gone to put on their boots,...

Indeed - who hasn't gone to put on their boots, only to find that they're crispy after a heavy frost?
Forum: Touring
01-13-23, 06:49 AM
Replies: 27
Views: 725
Posted By grumpus

It was the socks I recommended, because socks...

It was the socks I recommended, because socks don't care about pedal studs.

IME when my feet are comfortable in good socks I don't care if my shoes are wet.
Forum: Touring
01-12-23, 01:50 PM
Replies: 27
Views: 725
Posted By grumpus

You didn't have to look them up, I put a link...

You didn't have to look them up, I put a link (www.sealskinz.com/collections/socks/) there for you to click on.

If you click on this link (http://www.sealskinz.com/collections/socks//) you'll see...
01-11-23, 08:06 PM
Replies: 722
Views: 17,152
Posted By grumpus

... using different wheel sizes in the same frame.

... using different wheel sizes in the same frame.
01-11-23, 05:50 PM
Replies: 22
Views: 1,218
Posted By grumpus

Never posting again, apparently - I wonder if the...

Never posting again, apparently - I wonder if the fork got him.
01-11-23, 12:22 PM
Replies: 13
Views: 4,626
Posted By grumpus

Seems like that's at least the second necropost...

Seems like that's at least the second necropost I've disturbed in as many months. Note to self: check OP date before replying.
01-11-23, 08:10 AM
Replies: 26
Views: 604
Posted By grumpus

A quick and dirty hack is to get a 7/8 inch...

A quick and dirty hack is to get a 7/8 inch wooden dowel (or just whittle some random wood 'til it fits) and jam it in the end of the handlebar then you can mount a thumb shifter as a bar end shifter.
01-11-23, 07:17 AM
Replies: 39
Views: 694
Posted By grumpus

Worn chain and/or worn cassette is the usual...

Worn chain and/or worn cassette is the usual reason for this. Or you might have a stiff chain link - check that each link will flex without sticking.
Freewheel or cassette depending on which you...
01-08-23, 01:15 PM
Replies: 13
Views: 478
Posted By grumpus

I expect they switched from belt to chain without...

I expect they switched from belt to chain without changing the model designation, and the OP has an older one.
01-08-23, 01:11 PM
Replies: 13
Views: 4,626
Posted By grumpus

I'd guess in the region of 1.5 mm depending on...

I'd guess in the region of 1.5 mm depending on what grade alloy Specialized chose to use, they seem to be deliberately vague about that. Tube thickness is chosen for strength in the heat affected...
01-07-23, 09:16 AM
Replies: 12
Views: 405
Posted By grumpus

That's how I repair rips, I'm hard on clothes and...

That's how I repair rips, I'm hard on clothes and manage to shred or tear particularly the combat trousers that I wear most days - on those I put a scrap of lightweight fabric behind the damage then...
01-06-23, 07:07 PM
Replies: 39
Views: 1,062
Posted By grumpus

Bare aluminium is very reactive, the surface will...

Bare aluminium is very reactive, the surface will oxidise almost instantly on exposure to air. The twist is that this thin oxide layer then prevents oxidation, so when further corrosion does occur it...
01-06-23, 04:43 PM
Replies: 59
Views: 1,458
Posted By grumpus

In the absence of suitable trees, I've used a...

In the absence of suitable trees, I've used a lamp post to anchor something bent that needed straightening. Wooden wedges will probably be useful for this one to get the kinks out of the top tubes...
01-02-23, 12:33 PM
Replies: 59
Views: 1,852
Posted By grumpus

Solid tyres don't feel like high pressure...

Solid tyres don't feel like high pressure pneumatic tyres, they feel like crap. The only reason to use solid tyres is if you'll only occasionally use the bike - maybe just a mile down the road to get...
01-02-23, 11:41 AM
Replies: 17
Views: 354
Posted By grumpus

Middle of the spoke or middle of the wheel? I'm...

Middle of the spoke or middle of the wheel? I'm guessing the latter because the only time I've seen a failed spoke that wasn't broken at one end or the other was when it had been chewed by the chain.
12-14-22, 05:02 PM
Replies: 29
Views: 630
Posted By grumpus

Just get some Suntour Power shifters and use them...

Just get some Suntour Power shifters and use them as nature intended.
12-12-22, 12:15 PM
Replies: 21
Views: 550
Posted By grumpus

There should be at most barely perceptible...

There should be at most barely perceptible movement side to side, such that you can perhaps feel it but not really see it.
12-12-22, 07:53 AM
Replies: 16
Views: 447
Posted By grumpus

That's what I use, but with a measuring scale...

That's what I use, but with a measuring scale rather than a dial gauge - you only need 1 mm resolution.
12-07-22, 10:25 AM
Replies: 25
Views: 788
Posted By grumpus

I think it's fairly evident from the shape of the...

I think it's fairly evident from the shape of the recessed spoke holes which way they're supposed to go together. I wonder why this "vast improvement over conventional hubs" didn't have more impact....
12-07-22, 09:57 AM
Replies: 17
Views: 677
Posted By grumpus

Cable adjuster detent.

Cable adjuster detent.
12-07-22, 08:57 AM
Replies: 10
Views: 232
Posted By grumpus

Why not get some RapidFire shifters and keep your...

Why not get some RapidFire shifters and keep your current brake levers? They're ergonomically better then EZFire and don't have the limitation of a combined brake/gear lever....
12-06-22, 03:21 PM
Replies: 12
Views: 384
Posted By grumpus

The head tube has probably stretched - it takes a...

The head tube has probably stretched - it takes a hammering if the bearings are a bit loose, and low grade steel will deform easily. So it's probably time for a new head tube.
12-06-22, 09:31 AM
Replies: 31
Views: 794
Posted By grumpus

Except no. The most rear braking you get is not...

Except no. The most rear braking you get is not quite locking the wheel, which is why we choose modulation in preference to digital braking.
11-24-22, 10:53 AM
Replies: 39
Views: 1,014
Posted By grumpus

I've made some webbing straps using grandma's...

I've made some webbing straps using grandma's sewing machine with ordinary polyester thread and they're totally OK for the intended use (hitching a heavy load to a winch and winding it up a steep...
11-22-22, 03:24 PM
Replies: 10
Views: 375
Posted By grumpus

The race should be a firm press fit. You need to...

The race should be a firm press fit. You need to support the race evenly so it's dead square as you press it on - if it tilts as in your picture it can dig in, not go on and damage the fork. It might...
11-22-22, 11:46 AM
Replies: 39
Views: 1,014
Posted By grumpus

That would be fine if epoxy had the right tensile...

That would be fine if epoxy had the right tensile properties, but it doesn't which is why it's only used to glue the structural fibres together. My plan would be to remove the damaged section by...
11-15-22, 01:56 PM
Replies: 30
Views: 764
Posted By grumpus

Kerosene or diesel also work well. I usually...

Kerosene or diesel also work well. I usually scrape off the worst of the crud with a small screwdriver that can get into the corners. A wire brush is also good for pre-cleaning on components that it...
11-13-22, 06:06 PM
Replies: 11
Views: 232
Posted By grumpus

There's not really a common theme among my bikes,...

There's not really a common theme among my bikes, I build different machines to have different qualities, not to have more of the same. They do tend towards mudguards and pannier racks, but that's a...
11-08-22, 07:04 PM
Replies: 20
Views: 568
Posted By grumpus

Hehe. A brief perusal of the Sheldon Brown site...

Hehe. A brief perusal of the Sheldon Brown site suggests to me that John Allen uses "distance" but Sheldon used "dimension".
11-08-22, 04:39 PM
Replies: 67
Views: 1,393
Posted By grumpus

We acquired a couple of "mountain bikes" that had...

We acquired a couple of "mountain bikes" that had been severely front-ended - I tied each bike between two cars and pulled it straight, both frame and fork at once. I wouldn't try that with a bike...
11-08-22, 01:05 PM
Replies: 16
Views: 2,788
Posted By grumpus

Necropost alert - how embarrassing, I'm not sure...

Necropost alert - how embarrassing, I'm not sure how that happened. Well, clearly I wasn't paying attention and fell down the rabbit hole ...
11-08-22, 09:30 AM
Replies: 16
Views: 2,788
Posted By grumpus

To remove the axle you'll need to press the...

To remove the axle you'll need to press the bearing out on one side. Support the hub on a solid surface (large bench vice, concrete floor, tree stump) with a block of wood into which you have drilled...
11-08-22, 08:20 AM
Replies: 31
Views: 19,831
Posted By grumpus

The general opinion seems to be that nobody is...

The general opinion seems to be that nobody is sure that the axles were properly tightened at the outset. Anyone who has had a problem will presumably pay more attention going forward, then we'll see...
11-03-22, 10:10 AM
Replies: 37
Views: 863
Posted By grumpus

I believe I just stated that. I was simply...

I believe I just stated that. I was simply clarifying that "6/7/8 speed" is a designation of a particular chain size, it doesn't mean that original 6 speed chains are interchangeable with 7 speed or...
11-03-22, 09:54 AM
Replies: 37
Views: 863
Posted By grumpus

Two ways to size a chain: Put it on big/big...

Two ways to size a chain:
Put it on big/big (not fitted to the derailleur) and add a link or two of slack. That's the shortest it can be and not lock up if you ever shift to big/big.
Put it on...
11-03-22, 07:05 AM
Replies: 5
Views: 151
Posted By grumpus

You'll need a longer fork steerer. You can fit an...

You'll need a longer fork steerer. You can fit an extension piece to metal steerers but I'm not sure if there are any that will be safe with carbon. A carbon repair specialist could probably fit a...
11-03-22, 06:11 AM
Replies: 37
Views: 863
Posted By grumpus

But an actual 6 speed chain, or 5/6 speed (if you...

But an actual 6 speed chain, or 5/6 speed (if you happen to find one) won't run on a 7 or 8 speed cassette - the pins stick out too far past the plates. A chain labeled 7 speed will run on 6/7/8...
10-30-22, 09:11 PM
Replies: 30
Views: 809
Posted By grumpus

You won't be buying a 700 mm tyre - if you want...

You won't be buying a 700 mm tyre - if you want 700 mm overall then (700 - 622) / 2 is the tyre width you want, and you'll be buying a 700 x 39 C
Don't get the biggest tyre that could possibly fit;...
10-28-22, 06:50 PM
Replies: 33
Views: 1,137
Posted By grumpus

I don't carry wooden blocks in my emergency tool...

I don't carry wooden blocks in my emergency tool kit, but kerbs are available on many roads.
10-28-22, 11:14 AM
Replies: 67
Views: 1,393
Posted By grumpus

Good axles are quite hard. I have an angle...

Good axles are quite hard. I have an angle grinder holder that turns the grinder into a mini chop saw for a square cut. I use a slitting disc to slice the end off, then chamfer it on the bench...
10-28-22, 10:37 AM
Replies: 67
Views: 1,393
Posted By grumpus

It shouldn't be difficult, something like this...

It shouldn't be difficult, something like this D2O Rear Hollow 10 mm Axle - 140 mm (www.sjscycles.co.uk/hub-spares/d2o-rear-hollow-10-mm-axle-140-mm/) just needs a bit taken off the end if the exact...
10-27-22, 03:34 PM
Replies: 18
Views: 480
Posted By grumpus

At the least, do nothing - just tighten the axle...

At the least, do nothing - just tighten the axle nuts to pull the dropouts in (but this may place stress on the frame and axle, in time resulting in bending or breaking). Next easiest - space the hub...
10-27-22, 02:50 PM
Replies: 33
Views: 1,137
Posted By grumpus

No matter where you're at... There you are...

No matter where you're at... There you are...
Showing results 1 to 50 of 67
 


 
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