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Search: Posts Made By: oldbobcat
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
05-27-24, 01:37 PM
Replies: 23
Views: 533
Posted By oldbobcat

I've worked on dozens of these. They're like a...

I've worked on dozens of these. They're like a Trek FX or a Cannondale Swift. Problems indexing on a cog on either end of the cassette usually indicates a limit screw is a little too tight. Problems...
Forum: Bicycle Mechanics
05-25-24, 05:19 PM
Replies: 3
Views: 155
Posted By oldbobcat

Looks pretty bad to me. The way I tell is to put...

Looks pretty bad to me. The way I tell is to put a new chain on, then pull tension on the crank and look over the top for the chain riding up on the teeth and gaps between the rollers and the teeth....
Forum: Bicycle Mechanics
05-25-24, 03:17 PM
Replies: 20
Views: 520
Posted By oldbobcat

Yeah, but that's a lot of chain slap, and most...

Yeah, but that's a lot of chain slap, and most likely the chain is rattling on the inside of the big ring.

But, properly set up, 105 11-speed is a pretty slick-shifting setup, and the brakes work...
Forum: Bicycle Mechanics
05-24-24, 01:56 PM
Replies: 5
Views: 172
Posted By oldbobcat

If I had a nickel for every home mechanic who...

If I had a nickel for every home mechanic who messed up the order and orientation of those spherical washers, I could buy coffee for the entire forum. Once you get that right, I find that orienting...
Forum: Bicycle Mechanics
05-24-24, 01:45 PM
Replies: 18
Views: 535
Posted By oldbobcat

First off, the rotor is not installed backwards,...

First off, the rotor is not installed backwards, and flipping it wouldn't change anything anyway. Those things are supposed to be flat as a 45 rpm vinyl record. You can play both sides.

Second, if...
Forum: Bicycle Mechanics
05-24-24, 01:26 PM
Replies: 23
Views: 533
Posted By oldbobcat

You can't get much simpler than 2x9. The big ring...

You can't get much simpler than 2x9. The big ring is for easy flats, downhill, and downwind. The little ring is for uphill and upwind. Choose the ring to match the general terrain, then choose the...
Forum: Bicycle Mechanics
05-24-24, 01:14 PM
Replies: 16
Views: 428
Posted By oldbobcat

If it's the same frame, and the same headset, but...

If it's the same frame, and the same headset, but a different fork, that would indicate that the lower bearing isn't seating correctly on the fork crown or something was assembled incorrectly. The...
Forum: Bicycle Mechanics
05-23-24, 04:38 PM
Replies: 20
Views: 520
Posted By oldbobcat

If the bike fits, there's really nothing wrong...

If the bike fits, there's really nothing wrong with it. The control levers have a reach adjustment. If you peel back the top of the rubber hoods you should find a grub screw that takes either a...
Forum: Fitting Your Bike
05-23-24, 04:29 PM
Replies: 28
Views: 914
Posted By oldbobcat

Yep, whether its a S or XS, it should still fit....

Yep, whether its a S or XS, it should still fit. Most women stop growing in their later teen years anyway. If it's still a concern, she should ride down to here local bike shop and get a 10-minute...
Forum: Fitting Your Bike
05-23-24, 02:08 PM
Replies: 28
Views: 914
Posted By oldbobcat

With some bikes using extended head tubes for...

With some bikes using extended head tubes for comfort, effective seat tube length hardly has any meaning now. My 58 cm H2 Trek Madone has not a single dimension that measures 58 cm, and using your...
Forum: Bicycle Mechanics
05-21-24, 04:22 PM
Replies: 20
Views: 467
Posted By oldbobcat

For 20 bucks a bike shop will either adjust that...

For 20 bucks a bike shop will either adjust that derailleur for you or tell you why i can't be adjusted and give you your money back.
Forum: Fitting Your Bike
05-19-24, 04:13 PM
Replies: 11
Views: 226
Posted By oldbobcat

Specialized had a line of crossover hybrids sized...

Specialized had a line of crossover hybrids sized like that, too, around 2009-10. All the shops ordered as if they were normally sized, so there were a lot of 57s, 59s, and maybe even some 61s, on...
Forum: Bicycle Mechanics
05-19-24, 11:16 AM
Replies: 36
Views: 865
Posted By oldbobcat

The attachment clamps of roof-mount trays are...

The attachment clamps of roof-mount trays are pretty independent of the shape of the crossbars nowadays. I've always been partial to Thule, but I've never heard any complaints about Yakima. And don't...
Forum: Bicycle Mechanics
05-19-24, 11:09 AM
Replies: 36
Views: 865
Posted By oldbobcat

Under sub-hurricane conditions, no. As for side...

Under sub-hurricane conditions, no. As for side G's, most cars and SUVs lose traction at 0.70-0.85, and most drivers rarely exceed 0.6.
Forum: Fitting Your Bike
05-18-24, 08:43 AM
Replies: 2
Views: 196
Posted By oldbobcat

I just put 28 mm GP 5000s on my 12 year old...

I just put 28 mm GP 5000s on my 12 year old Madone. They're a bit narrower than the 28 mm Bontrager R3 Lites I was using, so they work very well with the older, narrower rims, and there are no...
Forum: Fitting Your Bike
05-18-24, 08:35 AM
Replies: 11
Views: 226
Posted By oldbobcat

Not without a plumb bob, a protractor, and some...

Not without a plumb bob, a protractor, and some trigonometry. Personally, I can't even remember my stack and reach preferences, but give me dimensions for head tube, virtual top tube, bottom bracket...
Forum: Bicycle Mechanics
05-17-24, 08:59 PM
Replies: 18
Views: 485
Posted By oldbobcat

Bicycles don't customarily throw off nuts and...

Bicycles don't customarily throw off nuts and bolts, and trying to anticipate what you're likely to break or lose is nearly impossible. Keep your spares, remember your local bike shop has spares,...
Forum: Fitting Your Bike
05-17-24, 11:02 AM
Replies: 15
Views: 696
Posted By oldbobcat

The inseam method is almost as old as the days...

The inseam method is almost as old as the days when the salesman would simply pull down the largest frame that didn't crush your nuts when you straddled it. These days, manufacturer recommendation is...
Forum: Bicycle Mechanics
05-15-24, 12:23 PM
Replies: 34
Views: 894
Posted By oldbobcat

Oops, I forgot about that.

Oops, I forgot about that.
Forum: Bicycle Mechanics
05-15-24, 08:32 AM
Replies: 34
Views: 894
Posted By oldbobcat

FYI, all brakes that aren't drum brakes or old...

FYI, all brakes that aren't drum brakes or old Raleigh-style lever brakes are caliper brakes.

The tapered tubes say this is a hydroformed aluminum frame. The shift cables are internally routed...
Forum: Bicycle Mechanics
05-14-24, 08:43 AM
Replies: 34
Views: 1,292
Posted By oldbobcat

You can't put a 36t chainring on a crank with a...

You can't put a 36t chainring on a crank with a 130 mm bcd. 38t is available, but the gain is minimal and there will be problems as soon as the ring and chain start to show a little bit of wear....
Forum: Bicycle Mechanics
05-12-24, 11:05 AM
Replies: 43
Views: 1,003
Posted By oldbobcat

And why not bar-end shifters? They would appear...

And why not bar-end shifters? They would appear to be easier to actuate than any of these brake-hood attachments, providing you can get your hands on the drops.
Forum: Bicycle Mechanics
05-12-24, 11:02 AM
Replies: 43
Views: 1,003
Posted By oldbobcat

I was just using your post as a reference point,...

I was just using your post as a reference point, not trying to correct you. I'm sorry anybody misunderstood. But, yeah, the levers are the most costly part of the system, so it's kind of silly to...
Forum: Bicycle Mechanics
05-11-24, 06:28 PM
Replies: 43
Views: 1,003
Posted By oldbobcat

How? Dual control levers are a ratcheting...

How? Dual control levers are a ratcheting mechanism, and friction levers work by continuous sweep. By the time you swept the lever to the largest cog, you'd have to take your hand off the handlebar...
Forum: Bicycle Mechanics
05-10-24, 02:33 PM
Replies: 53
Views: 33,635
Posted By oldbobcat

After 16 years of dormancy, this thread lives...

After 16 years of dormancy, this thread lives again!
Forum: Bicycle Mechanics
05-09-24, 11:31 AM
Replies: 2
Views: 184
Posted By oldbobcat

Or you can buy new rubber pad cartridges already...

Or you can buy new rubber pad cartridges already inside the holders. SRAM, Shimano, Bontrager, or Jagwire will work.
Forum: Bicycle Mechanics
05-09-24, 11:27 AM
Replies: 6
Views: 325
Posted By oldbobcat

Make sure the stiff part of the tube where the...

Make sure the stiff part of the tube where the valve is attached is seated properly INSIDE the tire. And don't ride with a partially inflated tube.
Forum: Bicycle Mechanics
05-07-24, 10:54 AM
Replies: 5
Views: 214
Posted By oldbobcat

If you're still insisting on doing this, you...

If you're still insisting on doing this, you could group your spokes at the in threes, skipping a hole but alternating the head direction at the flange. At 3-cross, each spoke would cross one skip,...
Forum: Bicycle Mechanics
05-07-24, 10:39 AM
Replies: 6
Views: 259
Posted By oldbobcat

Bontrager (Trek) has a fender set for 700c x...

Bontrager (Trek) has a fender set for 700c x 32-35 mm tires. You might still have to notch them to get around the fork crown and rear stay bridges on your bike....
Forum: Bicycle Mechanics
05-07-24, 10:25 AM
Replies: 31
Views: 793
Posted By oldbobcat

I keep a couple for emergencies in my...

I keep a couple for emergencies in my under-saddle bag. I've even used them and forgotten they were there until I changed the tire. I think the trick is to keep them in a reasonably moisture-proof...
Forum: Fitting Your Bike
05-04-24, 09:53 AM
Replies: 6
Views: 400
Posted By oldbobcat

The Soma Highway One compact drop bar is...

The Soma Highway One compact drop bar is available with a 26.0 mm clamping diameter. The flat top and short reach are designed to work better with dual control levers....
Forum: Fitting Your Bike
05-03-24, 09:41 AM
Replies: 39
Views: 1,197
Posted By oldbobcat

You can see for yourself with regular road bars....

You can see for yourself with regular road bars. Start climbing a long hill, seated, with your hands on the tops. Now stand up without moving your hands.

I've done this for short intervals when I...
Forum: Fitting Your Bike
05-03-24, 09:15 AM
Replies: 39
Views: 1,197
Posted By oldbobcat

Different strokes for different folks. I think...

Different strokes for different folks. I think what you're describing is getting close to a mustache bar....
Forum: Fitting Your Bike
05-03-24, 08:58 AM
Replies: 39
Views: 1,197
Posted By oldbobcat

While seated.

While seated.
Forum: Fifty Plus (50+)
05-02-24, 05:08 PM
Replies: 18
Views: 1,022
Posted By oldbobcat

You'll find a way. I once spent a late winter and...

You'll find a way. I once spent a late winter and early spring downhill skiing and cycling while wearing a cast for a broken wrist. The cast tore up a mitten and the handlebar tape, and I had to be...
Forum: Fitting Your Bike
05-02-24, 05:01 PM
Replies: 39
Views: 1,197
Posted By oldbobcat

So if the common wisdonm got tire (wheel) width...

So if the common wisdonm got tire (wheel) width wrong, how much other stuff did they miss? This has the makings of a conspiracy theory.

Look at it this way. If you move your hand 4 cm in either...
Forum: Bicycle Mechanics
04-27-24, 06:34 PM
Replies: 23
Views: 835
Posted By oldbobcat

Good detective work.

Good detective work.
Forum: Bicycle Mechanics
04-26-24, 02:51 PM
Replies: 23
Views: 835
Posted By oldbobcat

Don't ride your bike? Sorry, there are...

Don't ride your bike?

Sorry, there are myriad reasons for a chain popping off. I don't know how anyone can solve this without looking at the bike, or not even knowing what kind of bike it is, or...
Forum: Bicycle Mechanics
04-25-24, 05:26 PM
Replies: 14
Views: 737
Posted By oldbobcat

Good idea. This is hardly the carbon steerer for...

Good idea. This is hardly the carbon steerer for a first-timer to practice on.
Forum: Bicycle Mechanics
04-25-24, 05:06 PM
Replies: 19
Views: 647
Posted By oldbobcat

If it was loose crank arms, the shop mechanic...

If it was loose crank arms, the shop mechanic would have figured it out and fixed it right away. You'd think.

How old is this Puch, and how many cogs does it have on the rear cluster?
Forum: Bicycle Mechanics
04-24-24, 06:50 PM
Replies: 38
Views: 1,266
Posted By oldbobcat

First, it looks like your rear wheel is...

First, it looks like your rear wheel is improperly dished. But you didn't ask about that, so I'll set that aside for now.

Second, your entire brake adjustment is wonky. If I were working on your...
Forum: Fitting Your Bike
04-22-24, 03:06 PM
Replies: 13
Views: 572
Posted By oldbobcat

This forum is about bike fit. Gear ratios are not...

This forum is about bike fit. Gear ratios are not about bike fit. You might get better responses if you post this in mechanics or mountain biking
Forum: Bicycle Mechanics
04-22-24, 01:17 PM
Replies: 65
Views: 2,667
Posted By oldbobcat

39 is as low as you can reliably go on a 130 mm...

39 is as low as you can reliably go on a 130 mm BCD. I've seen 38s, but for the single-tooth gain they aren't worth the bother. At the first hint of wear on the teeth and chain, the chain starts to...
Forum: Bicycle Mechanics
04-20-24, 02:49 PM
Replies: 65
Views: 2,667
Posted By oldbobcat

Your current low gear ration is 1.7:1. Most...

Your current low gear ration is 1.7:1. Most likely, your rear derailleur will handle a 13/28 cassette with no problem. That gives you a low of 1.4:1. I don't know what the hills in your neighborhood...
Forum: Bicycle Mechanics
04-17-24, 01:34 PM
Replies: 7
Views: 574
Posted By oldbobcat

I love a mystery.

I love a mystery.
Forum: Bicycle Mechanics
04-16-24, 11:20 AM
Replies: 42
Views: 1,712
Posted By oldbobcat

I used Universal 68s for 7-8 years, until I...

I used Universal 68s for 7-8 years, until I finally sprung for a full Super Record kit. Following the move away from centerpulls in the early '60s, nearly everyone used these until Campaganolo made a...
Forum: Bicycle Mechanics
04-16-24, 09:50 AM
Replies: 10
Views: 568
Posted By oldbobcat

Great idea. This sort of thing is pretty routine...

Great idea. This sort of thing is pretty routine for most shops.
Forum: Bicycle Mechanics
04-16-24, 09:45 AM
Replies: 7
Views: 574
Posted By oldbobcat

If you're switching to a double-ring crank, you...

If you're switching to a double-ring crank, you should use a shorter spindle, 108-110 mm. If this is a triple, 115 mm will be fine, as long as the inner chainring doesn't hit the chainstay.
Forum: Bicycle Mechanics
04-16-24, 09:36 AM
Replies: 30
Views: 1,639
Posted By oldbobcat

You said it right there. Anything on a 10-speed...

You said it right there. Anything on a 10-speed chain or thinner after 3000 miles is on borrowed time.
Forum: Bicycle Mechanics
04-14-24, 10:32 AM
Replies: 21
Views: 1,088
Posted By oldbobcat

I can try to guess what your problem is and give...

I can try to guess what your problem is and give you advice that might address the problem. Or I can show you where you can learn to really fix it yourself....
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