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Search: Posts Made By: oldbobcat
Showing results 1 to 50 of 275
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Forum: Bicycle Mechanics
09-11-23, 04:58 PM
Replies: 7
Views: 222
Posted By oldbobcat

I see two, one on what's presumably the cone and...

I see two, one on what's presumably the cone and one on the locknut. It might be helpful to see what the other side looks like.
Forum: Fitting Your Bike
09-07-23, 02:11 PM
Replies: 8
Views: 325
Posted By oldbobcat

Tilting the bar up can render the drops unusable....

Tilting the bar up can render the drops unusable. The hands will tend to slide off the bar ends. The default position for dual-control levers is dead-level, but if tilting them up a little works for...
Forum: Bicycle Mechanics
09-01-23, 10:01 AM
Replies: 15
Views: 308
Posted By oldbobcat

If it doesn't show a slot or socket to insert a...

If it doesn't show a slot or socket to insert a tool into, it is intended to be pried off with using a thin screwdriver or pick. Once you get it off you'll notice it's retained by a rather thin lip.
Forum: Bicycle Mechanics
08-31-23, 12:42 PM
Replies: 61
Views: 2,239
Posted By oldbobcat

When I was wrenching professionally we turned...

When I was wrenching professionally we turned away few big-box bikes summarily, but we did our best to manage customer expectations and not waste our time and and their money. Shop around if you can....
Forum: Bicycle Mechanics
08-30-23, 04:22 PM
Replies: 6
Views: 183
Posted By oldbobcat

The lower ring is a dust cap. It fits over the...

The lower ring is a dust cap. It fits over the crown race and attempts to keep grime out of the bearing. It's OK if you can move it around a little, but it won't hurt to open it up and make sure...
Forum: Fitting Your Bike
08-30-23, 10:33 AM
Replies: 5
Views: 350
Posted By oldbobcat

The Specialized Roubaix is still the king of...

The Specialized Roubaix is still the king of stack, especially in larger sizes. Trek's Domane might be second.
Forum: Bicycle Mechanics
08-25-23, 09:40 PM
Replies: 46
Views: 1,324
Posted By oldbobcat

Shouldn't the professional mechanic at the bike...

Shouldn't the professional mechanic at the bike shop have thought of this?

Actually, no. He installed what he had on hand rather than looking up or measuring and ordering the correct unit. That...
Forum: Bicycle Mechanics
08-22-23, 10:18 AM
Replies: 19
Views: 533
Posted By oldbobcat

Really, there are no short cuts or "secrets" to...

Really, there are no short cuts or "secrets" to fishing out a buggered cable. Persistence, a pick,and maybe some penetrating oil.
Forum: Bicycle Mechanics
08-21-23, 06:04 PM
Replies: 19
Views: 533
Posted By oldbobcat

That's what we do when somebody uses it so long...

That's what we do when somebody uses it so long that if unravels inside the shifter. A pick, a needle-nose pliers, and sometimes tweezers and a mirror will help.
Forum: Fitting Your Bike
08-19-23, 09:01 PM
Replies: 13
Views: 703
Posted By oldbobcat

Your center of gravity should be roughly over or...

Your center of gravity should be roughly over or slightly behind the foot that's pushing down on the crank. With a trainer, try the no-hands center-of-gravity test. Remove your hands from the hoods...
Forum: Fitting Your Bike
08-16-23, 01:42 PM
Replies: 6
Views: 324
Posted By oldbobcat

In my experience sitting up is more to facilitate...

In my experience sitting up is more to facilitate breathing. My sitting "power angle" for climbing is the same as for flats--hands throttling the hoods and elbows bent. Obviously, this is not...
Forum: Bicycle Mechanics
08-13-23, 02:42 PM
Replies: 3
Views: 131
Posted By oldbobcat

What Habanero said. Take the fork to a bike shop....

What Habanero said. Take the fork to a bike shop. They will measure it correctly and find a suitable aftermarket fork from their wholesale sources.
Forum: Bicycle Mechanics
08-13-23, 02:37 PM
Replies: 12
Views: 308
Posted By oldbobcat

As long as the dust caps are in place and the...

As long as the dust caps are in place and the wheel spins freely, no binding and no wobbling, you should be fine. Just wipe off the excess grease and ride.
Forum: Bicycle Mechanics
07-31-23, 01:41 PM
Replies: 31
Views: 775
Posted By oldbobcat

Have the wheel inspected by a shop that knows...

Have the wheel inspected by a shop that knows what it's doing. There is no legitimate or safe reason to ride with a loose QR skewer.
Forum: Bicycle Mechanics
07-31-23, 01:38 PM
Replies: 9
Views: 304
Posted By oldbobcat

Usually, when a rear derailleur stops working,...

Usually, when a rear derailleur stops working, it's because something got bent. Usually the hanger. Check the hanger alignment before chasing rabbits down holes.
Forum: Bicycle Mechanics
07-19-23, 04:26 PM
Replies: 11
Views: 524
Posted By oldbobcat

Just remember that it's more important to match...

Just remember that it's more important to match the race of the new cone to the original rather than try to improve on it. The cups are designed to work with that taper, and they won't work with...
Forum: Fifty Plus (50+)
07-16-23, 11:20 AM
Replies: 40
Views: 2,240
Posted By oldbobcat

Be careful with that. Follow your cardio's orders...

Be careful with that. Follow your cardio's orders assiduously. The "flipping" sounds familiar. My stress test ended abruptly around the mid-130s. It was similar to what I'd been experiencing on my...
Forum: Bicycle Mechanics
07-15-23, 09:56 PM
Replies: 14
Views: 2,007
Posted By oldbobcat

The cable pull rates are the same, so if the...

The cable pull rates are the same, so if the 10-speed chain plays well with 9-speed pulleys, it should work.
Forum: Bicycle Mechanics
07-14-23, 07:52 PM
Replies: 3
Views: 238
Posted By oldbobcat

I presume you will be using a 142 mm rear wheel....

I presume you will be using a 142 mm rear wheel. To use a 10-speed cassette you will likely like need the 1.0 and 1.85 mm shims behind the cassette. And you might have to deal with some chainline...
Forum: Bicycle Mechanics
07-13-23, 08:19 AM
Replies: 13
Views: 501
Posted By oldbobcat

Try making one last try at getting rid of the...

Try making one last try at getting rid of the stem play. Loosen the stem angle bolt so it adjusts freely, and jiggle it up and down a little. Then hold the stem in place as you re-tighten the bolt....
Forum: Bicycle Mechanics
06-24-23, 11:50 AM
Replies: 7
Views: 374
Posted By oldbobcat

Thanks. Lately I've had all the snark I can...

Thanks. Lately I've had all the snark I can handle. It's easier to remember rules if you understand the reasoning behind them.
Forum: Fifty Plus (50+)
06-24-23, 09:39 AM
Replies: 16
Views: 909
Posted By oldbobcat

I rode an early "Sting Ray" conversion in '62,...

I rode an early "Sting Ray" conversion in '62, the summer I'd just turned ten. It was very difficult to control because of the extreme width and height of the handlebar.

All the major brands have...
Forum: Bicycle Mechanics
06-24-23, 09:28 AM
Replies: 6
Views: 322
Posted By oldbobcat

Only if they feel spongy.

Only if they feel spongy.
Forum: Bicycle Mechanics
06-24-23, 09:17 AM
Replies: 12
Views: 327
Posted By oldbobcat

Judging by dropout position relative to the angle...

Judging by dropout position relative to the angle of the steerer, it most definitely is bent. You can see that an impact to the dropout side (front) of the fork pushed the stanchions back against the...
Forum: Bicycle Mechanics
06-22-23, 11:04 PM
Replies: 25
Views: 843
Posted By oldbobcat

It has nothing to do with the brand of the bike...

It has nothing to do with the brand of the bike or whether it has a freewheel or cassette on the hub cluster. When you pedal in the right direction, the rear derailleur guides the chain onto the...
Forum: Fifty Plus (50+)
06-17-23, 01:18 PM
Replies: 73
Views: 2,925
Posted By oldbobcat

Yes, except when slowing or going downhill faster...

Yes, except when slowing or going downhill faster than we can keep up with the cranks.
Forum: Bicycle Mechanics
06-12-23, 08:09 PM
Replies: 21
Views: 478
Posted By oldbobcat

It sounds like you have two problems here. The...

It sounds like you have two problems here. The big one is the wobbly rear wheel. The other is that you're trying to understand it by looking at the front derailleur. So forget about the derailleur...
Forum: Bicycle Mechanics
06-12-23, 05:22 PM
Replies: 21
Views: 478
Posted By oldbobcat

A wobbly wheel that stops wobbling after...

A wobbly wheel that stops wobbling after tightening the QR skewer, and then starts wobbling again suggests that the hub axle is broken. Remove the skewer completely and see if you can pull the axle...
Forum: Bicycle Mechanics
06-09-23, 07:43 PM
Replies: 3
Views: 290
Posted By oldbobcat

There are dozens of How-to videos on YouTube on...

There are dozens of How-to videos on YouTube on adjusting rear derailleurs. There are hundreds of posts in the archive for this forum on adjusting rear derailleurs. There is also an excellent series...
Forum: Bicycle Mechanics
06-05-23, 06:07 PM
Replies: 5
Views: 320
Posted By oldbobcat

My rule of thumb for using Speedplay pedals is to...

My rule of thumb for using Speedplay pedals is to use shoes with stiff soles. At $400, that shouldn't be a problem.

Some manufacturers offer special-order shoes pre-drilled for the four-bolt...
Forum: Bicycle Mechanics
06-05-23, 06:02 PM
Replies: 18
Views: 463
Posted By oldbobcat

No. You don't know how worn the old chain is or...

No. You don't know how worn the old chain is or if it was sized correctly.

Follow the manufacturer's directions for sizing the chain, usually included with the chain. There are also dozens of...
Forum: Fifty Plus (50+)
05-29-23, 06:52 PM
Replies: 55
Views: 3,107
Posted By oldbobcat

Once you're dialed into it, it really doesn't go...

Once you're dialed into it, it really doesn't go away as long as you take care of your core. OK, you might go up a couple mm when you turn 80, but don't count on it.
Forum: Fifty Plus (50+)
05-29-23, 06:48 PM
Replies: 6
Views: 872
Posted By oldbobcat

That's the year I bought an F5. With an 11-23,...

That's the year I bought an F5. With an 11-23, I'll bet it had compact rings of 50-36. I replaced the worn-out rings on my Trek with 50-36. Now I use the small ring more, and I don't have to...
Forum: Bicycle Mechanics
05-27-23, 05:57 PM
Replies: 9
Views: 296
Posted By oldbobcat

Before you go chasing down the derailleur rabbit...

Before you go chasing down the derailleur rabbit holes, make sure you are using a bottom bracket with the correct length spindle. Install your crank and rear wheel with your intended cassette. Then...
Forum: Fitting Your Bike
05-26-23, 09:02 AM
Replies: 11
Views: 796
Posted By oldbobcat

You're welcome. While I came up with this theory...

You're welcome. While I came up with this theory decades ago from observation of successful riders, ski racers, surfers, tennis players, volleyball players, and baseball players, and personal...
Forum: Fitting Your Bike
05-25-23, 11:31 AM
Replies: 11
Views: 796
Posted By oldbobcat

Basically, your body tries to balance itself over...

Basically, your body tries to balance itself over your feet. The lower you drop your torso, the farther back your hips want to go to avoid falling on your face, or at least doing pushups with your...
Forum: Bicycle Mechanics
05-06-23, 10:33 AM
Replies: 8
Views: 312
Posted By oldbobcat

The 6503 would be lighter. That's all. In this...

The 6503 would be lighter. That's all. In this generation you only got less durability when you dropped to Tiagra.

As shelbyfv said, they were designed to work with 52/42/30 ring sets, so your...
Forum: Bicycle Mechanics
05-05-23, 09:03 PM
Replies: 29
Views: 1,141
Posted By oldbobcat

Measure it.

Measure it.
Forum: Fifty Plus (50+)
05-04-23, 03:30 PM
Replies: 43
Views: 2,577
Posted By oldbobcat

My cardiologist just found a ventricular...

My cardiologist just found a ventricular tachycardia, so my orders are, take your meds, wear a HRM, and don't overdo it until we learn more about it. My prescription heart monitor is on order.
Forum: Bicycle Mechanics
05-04-23, 02:53 PM
Replies: 34
Views: 1,069
Posted By oldbobcat

If you give the tool a good yank you will not be...

If you give the tool a good yank you will not be under-tightening. Aside from vibration, there are no forces on the lock ring that will cause it to loosen.
Forum: Bicycle Mechanics
05-04-23, 02:41 PM
Replies: 40
Views: 1,257
Posted By oldbobcat

The Octalink (Hollowtech I) cranks were solid...

The Octalink (Hollowtech I) cranks were solid alloy. The first generation of Hollowtech II (5-arm spiders, Ultegra and Dura-Ace) were welded. the third generation (4-arm spiders) introduced bonding.
Forum: Bicycle Mechanics
05-01-23, 10:01 AM
Replies: 4
Views: 257
Posted By oldbobcat

SRAM 10-speed cassettes don't use the 1mm Shimano...

SRAM 10-speed cassettes don't use the 1mm Shimano spacer. SRAM never intended their 10-speed cassettes to be compatible with 8- and 9-speed because they started at 10.
Forum: Bicycle Mechanics
05-01-23, 09:53 AM
Replies: 4
?!
Views: 294
Posted By oldbobcat

Shimano gave up on Flight Deck long before 6800....

Shimano gave up on Flight Deck long before 6800. You're looking for shift cables in the wrong place. Roll back the rubber hoods from the sides. The shift cable should insert from the inside and wrap...
Forum: Bicycle Mechanics
05-01-23, 09:44 AM
Replies: 11
Views: 329
Posted By oldbobcat

Before chasing this down rabbit holes, we need to...

Before chasing this down rabbit holes, we need to know: short do you need to go?
Forum: Bicycle Mechanics
04-30-23, 08:41 AM
Replies: 4
Views: 257
Posted By oldbobcat

Correct.

Correct.
Forum: Fitting Your Bike
04-30-23, 12:39 AM
Replies: 12
Views: 801
Posted By oldbobcat

Treks run small. If you are 5'10" or taller,...

Treks run small. If you are 5'10" or taller, unless you have really short legs, do yourself a favor and walk away from it.

I mean, if someone gave me a bike that didn't fit, I'd probably ride it...
Forum: Fitting Your Bike
04-30-23, 12:32 AM
Replies: 23
Views: 1,272
Posted By oldbobcat

Getting back to the OP, by all measures the large...

Getting back to the OP, by all measures the large Giant is too big for a 6-footer unless you have a 91 cm inseam. Insist on a M/L It won't satisfy your bike-buying jones but you won't be doubting...
Forum: Fitting Your Bike
04-30-23, 12:16 AM
Replies: 7
Views: 617
Posted By oldbobcat

I was wondering, too. Only the designers know for...

I was wondering, too. Only the designers know for sure, but here's my hypothesis. Breezer is historically a mountain bike company. The current trend in MTB design is to extend the top tube and pair...
Forum: Bicycle Mechanics
04-24-23, 10:26 AM
Replies: 38
Views: 1,067
Posted By oldbobcat

Come to think of it, many many years ago I had a...

Come to think of it, many many years ago I had a miserable Raleigh Super Course that would give me chain rub when I stood hard on the cranks. I never knew whether it was the bottom bracket spindle,...
Forum: Bicycle Mechanics
04-23-23, 08:35 PM
Replies: 38
Views: 1,067
Posted By oldbobcat

Mileage. This chain is worn out. Note how the...

Mileage. This chain is worn out. Note how the chain and the cogs mesh well at around 5 o'clock, and how it rides higher on the teeth as you move away from that position. A worn chain elongates. As...
Showing results 1 to 50 of 275
 
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