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Search: Posts Made By: grumpus
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
04-26-24, 01:37 PM
Replies: 4
Views: 102
Posted By grumpus

Surprising, my assumption would have been that...

Surprising, my assumption would have been that the timing chain is the least demanding place to put a ghost ring. It will remain a fun useful thing that I might try one day.
Forum: Bicycle Mechanics
04-26-24, 01:24 PM
Replies: 11
Views: 162
Posted By grumpus

Some of those results are the rear axle assembly...

Some of those results are the rear axle assembly from the cheapo Chinese trikes. Of the better looking kits, they're mostly for derailleur gears or coaster brakes, neither of which is suitable for...
Forum: Bicycle Mechanics
04-26-24, 12:52 PM
Replies: 4
Views: 102
Posted By grumpus

You only need a little over 1/4" axle movement if...

You only need a little over 1/4" axle movement if you don't mind using a half link in the chain. I wonder how much tension a ghost ring supports, without the hub it would normally be mounted on - I...
Forum: Bicycle Mechanics
04-26-24, 11:24 AM
Replies: 38
Views: 751
Posted By grumpus

Has it ever been left near cars? Just a tiny...

Has it ever been left near cars? Just a tiny accidental nudge with a bumper can do that, in your garage or locked up in the street.
Forum: Bicycle Mechanics
04-26-24, 11:14 AM
Replies: 19
Views: 11,730
Posted By grumpus

He's probably fixed it or given up in the ensuing...

He's probably fixed it or given up in the ensuing five years. The real easy fix is to use a threadless cartridge bottom bracket.
It doesn't have to be expensive, I recently bought one on eBay for...
Forum: Bicycle Mechanics
04-26-24, 11:05 AM
Replies: 11
Views: 162
Posted By grumpus

There are some really cheap Chinese trikes on the...

There are some really cheap Chinese trikes on the market now, selling new for the price of old used trikes but they are predictably heavy and low quality. I think if you could source just the axle...
Forum: Bicycle Mechanics
04-26-24, 10:40 AM
Replies: 11
Views: 162
Posted By grumpus

Agreed that most "training wheels" are junk -...

Agreed that most "training wheels" are junk - they don't teach kids how to ride a two wheeler, and don't provide improved stability at any speed (there have been sprung pivoting versions that are...
Forum: Bicycle Mechanics
04-26-24, 09:10 AM
Replies: 6
Views: 123
Posted By grumpus

Agree that looks like scuffs in the clear coat,...

Agree that looks like scuffs in the clear coat, or in some of the other photos into the colour coat too. First I'd try a squirt of WD40 or your preferred spray lube, and rub hard; after that some...
Forum: Bicycle Mechanics
04-25-24, 02:24 PM
Replies: 38
Views: 751
Posted By grumpus

We're not bending anything yet, just assessing.

We're not bending anything yet, just assessing.
Forum: Bicycle Mechanics
04-25-24, 01:59 PM
Replies: 38
Views: 751
Posted By grumpus

Yes I'm making assumptions, I'm trying to not get...

Yes I'm making assumptions, I'm trying to not get bogged down, to just get an overview of the situation. The unposted version did babble a bit about dropout alignment, it also jumped ahead and...
Forum: Bicycle Mechanics
04-25-24, 01:23 PM
Replies: 19
Views: 335
Posted By grumpus

It is, and it's not more effective for cleaning...

It is, and it's not more effective for cleaning bike parts than kerosene or diesel, which will not turn you into the human torch or destroy your house.
Forum: Bicycle Mechanics
04-25-24, 01:16 PM
Replies: 38
Views: 751
Posted By grumpus

OK, now we know the wheel is correctly dished,...

OK, now we know the wheel is correctly dished, and the dropouts need to move approximately 3.5 mm to the drive side, or at least they need to move so the rim moves 3.5 mm. That's not a lot, but it's...
Forum: Bicycle Mechanics
04-25-24, 12:09 PM
Replies: 62
Views: 1,678
Posted By grumpus

Stronglight 49D with 32-52 and 14-28 5s on the...

Stronglight 49D with 32-52 and 14-28 5s on the back. The rings were completely flat and with full profile teeth, as befits a crankset introduced in 1949 (the steel 49A was ten years older but...
Forum: Bicycle Mechanics
04-25-24, 10:56 AM
Replies: 13
Views: 239
Posted By grumpus

This was going to be my suggestion before I...

This was going to be my suggestion before I thought of noodles, but I'd use a grinder rather than a file - you can use a lighter touch so less risk of de-chucking. Having thought of noodles (again) I...
Forum: Bicycle Mechanics
04-25-24, 10:36 AM
Replies: 29
Views: 463
Posted By grumpus

I was going to amend my earlier post re: cut-down...

I was going to amend my earlier post re: cut-down old stem - I've an assortment of ally tubing that I use for sleeves and shims to make stuff fit where it doesn't, I probably have what the OP needed,...
Forum: Bicycle Mechanics
04-24-24, 09:00 PM
Replies: 52
Views: 1,459
Posted By grumpus

That may be giving undue credit to the previous...

That may be giving undue credit to the previous guy.
Forum: Bicycle Mechanics
04-24-24, 08:58 PM
Replies: 29
Views: 463
Posted By grumpus

OP mentioned it at the top of the thread - didn't...

OP mentioned it at the top of the thread - didn't want to deal with multiple spacers.
Forum: Bicycle Mechanics
04-24-24, 08:10 PM
Replies: 62
Views: 1,678
Posted By grumpus

Wide doubles have been around since at least the...

Wide doubles have been around since at least the 1970s, they just weren't mainstream.
Forum: Bicycle Mechanics
04-24-24, 07:58 PM
Replies: 38
Views: 751
Posted By grumpus

Ah okay you got me. I just started from the top...

Ah okay you got me. I just started from the top again because the OP seems to be having difficulty approaching the problem methodically. Whatever is out of alignment you need to start from somewhere...
Forum: Bicycle Mechanics
04-24-24, 07:39 PM
Replies: 15
Views: 344
Posted By grumpus

Indeed - I foolishly believed what was probably a...

Indeed - I foolishly believed what was probably a mistranslation of "air reservoir" to "tyre" and assumed they had incorporated a low pressure outlet. I tried unsuccessfully to find an actual user...
Forum: Bicycle Mechanics
04-24-24, 06:29 PM
Replies: 38
Views: 751
Posted By grumpus

I do believe that's what I wrote, only in some...

I do believe that's what I wrote, only in some detail so we might hopefully get some useful data.
Forum: Bicycle Mechanics
04-24-24, 06:25 PM
Replies: 15
Views: 344
Posted By grumpus

I don't think I'd feel comfortable riding a tyre...

I don't think I'd feel comfortable riding a tyre I knew I couldn't fix at the roadside - I had this issue with a tubed tyre/rim combination and added a couple of larger steel levers to my on-bike...
Forum: Bicycle Mechanics
04-24-24, 03:19 PM
Replies: 38
Views: 751
Posted By grumpus

Take a wheel, check that the axle is not bent,...

Take a wheel, check that the axle is not bent, the bearings are properly adjusted and the rim is true. Fit it to the frame and measure the distance from each chainstay to the rim (this will probably...
Forum: Bicycle Mechanics
04-24-24, 02:53 PM
Replies: 52
Views: 1,459
Posted By grumpus

Small/small is fine if you do it right, you're...

Small/small is fine if you do it right, you're setting the chain as long as it can be which can be useful if you might want to fit a larger ring or sprocket. Big/big is harder to get wrong, you're...
Forum: Bicycle Mechanics
04-24-24, 02:00 PM
Replies: 13
Views: 239
Posted By grumpus

I wonder if a good quality V-brake noodle could...

I wonder if a good quality V-brake noodle could be cut down to do the job. Otherwise anyone with a mini lathe should be able to make a few.
Forum: Bicycle Mechanics
04-24-24, 01:37 PM
Replies: 23
Views: 385
Posted By grumpus

A Mole wrench was probably the first tool I ever...

A Mole wrench was probably the first tool I ever bought, they're good if you only have a rock.
Forum: Bicycle Mechanics
04-24-24, 01:19 PM
Replies: 15
Views: 344
Posted By grumpus

I have a similar portable low noise compressor,...

I have a similar portable low noise compressor, it's too convenient and makes me lazy - track pumps are good exercise and I should use them instead. IIRC it kicks in at 80 psi and runs to 120 psi so...
Forum: Bicycle Mechanics
04-24-24, 12:09 PM
Replies: 31
Views: 603
Posted By grumpus

Likely the onboard BMS has isolated the battery...

Likely the onboard BMS has isolated the battery because it's dropped below its minimum voltage. That's why I suggested going into the battery pack and connecting directly to the cells - they may not...
Forum: Bicycle Mechanics
04-24-24, 11:44 AM
Replies: 23
Views: 385
Posted By grumpus

Topeak FlyPaper self adhesive tube patches -...

Topeak FlyPaper self adhesive tube patches - someone on here recommended them, so I added them to several bikes' kit - I normally carry a couple of tubes so they're unlikely to be needed, but you...
Forum: Bicycle Mechanics
04-24-24, 11:24 AM
Replies: 23
Views: 385
Posted By grumpus

​​​​​​Remove the chainring, place it on a rock,...

​​​​​​Remove the chainring, place it on a rock, hit it with another rock, sorted. Much more fun than being sent home from the start of a ride, he might even make it to the end.
Forum: Bicycle Mechanics
04-24-24, 11:05 AM
Replies: 5
Views: 149
Posted By grumpus

ITYF yours is a 2019, the 2020 was 1x. I...

ITYF yours is a 2019, the 2020 was 1x.

I don't think you'll notice a difference* between 36 and 38 teeth, and shifting may suffer because chainrings are designed as matched sets - the ramps and...
Forum: Bicycle Mechanics
04-24-24, 08:47 AM
Replies: 3
Views: 108
Posted By grumpus

From what I can find online the tension screws...

From what I can find online the tension screws are the same as the grip screws, looks like an M4 grub screw. The part number of those appears to be 710845879432
Forum: Bicycle Mechanics
04-24-24, 08:31 AM
Replies: 38
Views: 836
Posted By grumpus

I think his point was that the skewers don't have...

I think his point was that the skewers don't have any extra requirements beyond just holding the wheels on. Yes they are trying to twist and rock out of the ends when you're doing anything other than...
Forum: Bicycle Mechanics
04-24-24, 08:16 AM
Replies: 1
Views: 160
Posted By grumpus

Yes, there's supposed to be a little tab in the...

Yes, there's supposed to be a little tab in the back of the lever retaining the end of the front actuator arm bit.
Forum: Bicycle Mechanics
04-24-24, 07:50 AM
Replies: 38
Views: 836
Posted By grumpus

Vertical dropout takes the pedaling force, which...

Vertical dropout takes the pedaling force, which skewer has to counter with horizontal dropout. Rim brake produces minimal vertical reaction force, which skewer has to counter with disc-brake. So...
Forum: Bicycle Mechanics
04-24-24, 07:21 AM
Replies: 19
Views: 408
Posted By grumpus

Cantilever setup is very flexible, with most...

Cantilever setup is very flexible, with most types you can tune the brake response if you understand the geometry.
Forum: Bicycle Mechanics
04-24-24, 07:09 AM
Replies: 7
Views: 311
Posted By grumpus

Both dropout slots should be the same width - if...

Both dropout slots should be the same width - if the drive side is closed up you really should bend it back into shape, rather than removing material. I'd use a large cold chisel to pry it apart,...
Forum: Bicycle Mechanics
04-24-24, 06:44 AM
Replies: 15
Views: 344
Posted By grumpus

It says on that page you can use it for tyres,...

It says on that page you can use it for tyres, and it can be set to shut off at the correct pressure. It appears to have 8 mm quick connect male attachment point, so you'll need an 8 mm female quick...
Forum: Bicycle Mechanics
04-24-24, 06:02 AM
Replies: 25
Views: 527
Posted By grumpus

As already stated, these are JIS - they work a...

As already stated, these are JIS - they work a lot better with the correct driver. I use bits of inner cable as tiny wire brushes to clean out crusty fastener heads.
Forum: Bicycle Mechanics
04-24-24, 05:46 AM
Replies: 29
Views: 463
Posted By grumpus

I'd just cut down an old stem.

I'd just cut down an old stem.
Forum: Bicycle Mechanics
04-22-24, 02:43 PM
Replies: 20
Views: 609
Posted By grumpus

Looks like a freewheel with failed bearings;...

Looks like a freewheel with failed bearings; possibly just a loose faceplate but that's never supposed to need adjusting or tightening, it's not a serviceable assembly.
Forum: Bicycle Mechanics
04-22-24, 02:26 PM
Replies: 31
Views: 603
Posted By grumpus

I suspect you mean brake cleaner, not hydraulic...

I suspect you mean brake cleaner, not hydraulic fluid.
Forum: Bicycle Mechanics
04-21-24, 06:50 PM
Replies: 49
Views: 25,789
Posted By grumpus

nothing nothing nothing nothing nothing nothing

There is nothing above that - post titles are a decoration, they should not be relied on to convey information that is not present in the content area of the window/text box etc.
Forum: Bicycle Mechanics
04-21-24, 06:25 PM
Replies: 31
Views: 603
Posted By grumpus

A BMS will refuse to charge such a heavily...

A BMS will refuse to charge such a heavily discharged battery, you need to get some volts in there for it to be recognised as a good(?) battery. If you can access the internal connections you can try...
Forum: Bicycle Mechanics
04-21-24, 05:56 PM
Replies: 35
Views: 898
Posted By grumpus

First put the tube in the tyre, then put the tyre...

First put the tube in the tyre, then put the tyre on the rim. It may take some manipulation to get the "extra" bit of tube to lie flat, and you have to be careful not to damage the valve stem.
Forum: Bicycle Mechanics
04-21-24, 05:41 PM
Replies: 29
Views: 757
Posted By grumpus

It is an answer, quite a feasible one on the face...

It is an answer, quite a feasible one on the face of it, but it's something of a moot point because it seems that the bolt head doesn't require surgery after all.
Forum: Bicycle Mechanics
04-21-24, 04:58 PM
Replies: 49
Views: 25,789
Posted By grumpus

He could have got 14 days or a $5,000 fine but...

He could have got 14 days or a $5,000 fine but I'll let him off with a caution.
Forum: Bicycle Mechanics
04-21-24, 04:48 PM
Replies: 49
Views: 25,789
Posted By grumpus

Ah, OK, no worries. You've mistyped something...

Ah, OK, no worries. You've mistyped something else now, there should be a [/QUOTE] between the text you quoted and the comment you added. I try to remember to preview each post before I submit it,...
Forum: Bicycle Mechanics
04-21-24, 04:11 PM
Replies: 49
Views: 25,789
Posted By grumpus

It doesn't have a title line that I can see.

It doesn't have a title line that I can see.
Forum: Bicycle Mechanics
04-21-24, 08:22 AM
Replies: 49
Views: 25,789
Posted By grumpus

You reply to a 15/22 year old thread and your...

You reply to a 15/22 year old thread and your entire contribution is "aw"?
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