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Search: Posts Made By: oldbobcat
Showing results 1 to 50 of 1000
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Forum: Fitting Your Bike
05-19-24, 04:13 PM
Replies: 11
Views: 168
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: 734
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: 734
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: 154
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: 168
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: 13
Views: 259
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: 602
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: 812
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: 812
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: 1,170
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: 926
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: 926
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: 926
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: 33,487
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: 163
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: 308
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: 207
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: 224
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: 715
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: 358
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: 1,122
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: 1,122
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: 1,122
Posted By oldbobcat

While seated.

While seated.
Forum: Fifty Plus (50+)
05-02-24, 05:08 PM
Replies: 18
Views: 948
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: 1,122
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: 771
Posted By oldbobcat

Good detective work.

Good detective work.
Forum: Bicycle Mechanics
04-26-24, 02:51 PM
Replies: 23
Views: 771
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: 707
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: 608
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: 1,172
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: 535
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: 2,545
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: 2,545
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: 566
Posted By oldbobcat

I love a mystery.

I love a mystery.
Forum: Bicycle Mechanics
04-16-24, 11:20 AM
Replies: 36
Views: 1,446
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: 547
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: 566
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: 1,564
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: 994
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....
Forum: Classic & Vintage
04-10-24, 08:37 AM
Replies: 69
Views: 2,289
Posted By oldbobcat

We just learn to not pedal through corners. Of...

We just learn to not pedal through corners. Of course, with the current trend toward shorter cranks, 175 mm is becoming odder and rarer.

Pros who used 175s seem to have their own reasons. Jacques...
Forum: Fifty Plus (50+)
04-08-24, 09:39 AM
Replies: 79
Views: 3,269
Posted By oldbobcat

I look at cadence like IQ points. More rpm won't...

I look at cadence like IQ points. More rpm won't automatically make you faster, but it's a good thing to have and you can get more of it through exercise.
Forum: Bicycle Mechanics
04-08-24, 09:35 AM
Replies: 14
Views: 611
Posted By oldbobcat

Personally, I can live without 52/11 and the...

Personally, I can live without 52/11 and the crawling difference between 34 and 36 is so small that I prefer 50/36. I use the 36 more than I used the 34, and the drop from the 50 feels more like...
Forum: Bicycle Mechanics
04-08-24, 09:28 AM
Replies: 30
Views: 1,348
Posted By oldbobcat

A pile of parts that no one wants.

A pile of parts that no one wants.
Forum: Bicycle Mechanics
04-05-24, 06:21 PM
Replies: 21
Views: 833
Posted By oldbobcat

That will screw up your chain line. Better...

That will screw up your chain line.

Better to extend at the other end of the crank. Your local bike shop probably does not stock pedal spindle extenders, but they can order them for you from J&B....
Forum: Bicycle Mechanics
04-03-24, 04:25 PM
Replies: 14
Views: 523
Posted By oldbobcat

So have I.

So have I.
Forum: Bicycle Mechanics
04-01-24, 01:33 PM
Replies: 14
Views: 523
Posted By oldbobcat

Are you sure you threaded the chain on the...

Are you sure you threaded the chain on the correct side of the retention tab on the pivot arm of the rear derailleur?
Forum: Bicycle Mechanics
04-01-24, 01:14 PM
Replies: 13
Views: 642
Posted By oldbobcat

Have a pro mechanic look at it.

Have a pro mechanic look at it.
Forum: Bicycle Mechanics
04-01-24, 09:47 AM
Replies: 28
Views: 1,397
Posted By oldbobcat

Well, the stated problem was retraction and, in...

Well, the stated problem was retraction and, in my experience, the leading cause of failure to retract was busted plastic housings.
Forum: Bicycle Mechanics
03-31-24, 04:02 PM
Replies: 9
Views: 606
Posted By oldbobcat

Shimano fixed this when Sora went 9-speed. And...

Shimano fixed this when Sora went 9-speed. And 4600 is 10-speed, so there's a chain width discrepancy.
Forum: Fitting Your Bike
03-31-24, 02:18 PM
Replies: 1
Views: 258
Posted By oldbobcat

With this line, Medium is all you need to know.

With this line, Medium is all you need to know.
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