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Search: Posts Made By: furballi
Showing results 1 to 50 of 919
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Forum: Bicycle Mechanics
06-02-14, 10:12 PM
Replies: 109
Views: 9,609
Posted By furballi

An experienced builder checks spoke tension with...

An experienced builder checks spoke tension with his/her eyes, fingers, and ears. There will always be some sort of compromise made with each wheel. I always select round flat rim and will reject...
Forum: Bicycle Mechanics
06-02-14, 09:58 PM
Replies: 109
Views: 9,609
Posted By furballi

There are too many variables to come up with a...

There are too many variables to come up with a rule of thumb. My rear wheel was hit by a careless driver. Had to crank up the spoke tension way up on the drive side. Two of the spokes on the...
Forum: Bicycle Mechanics
06-01-14, 10:17 PM
Replies: 21
Views: 12,989
Posted By furballi

If the rims are true and not worn out, then you...

If the rims are true and not worn out, then you only need to replace the freewheel. The index downtube shifter will still work if you stick with 6-speed freewheel.

If you want to upgrade the rear...
Forum: Classic & Vintage
06-01-14, 10:08 PM
Replies: 50
Views: 16,810
Posted By furballi

CR-18 for wider tires. Strong, but quality is...

CR-18 for wider tires. Strong, but quality is only average.

Velocity Aero or Weinmann DP18 for narrower tires. These are cheap, strong, and relatively modern looking.
Forum: Clydesdales/Athenas (200+ lb / 91+ kg)
06-01-14, 09:54 PM
Replies: 34
Views: 4,901
Posted By furballi

OP's choices are poor for a heavy rider who is...

OP's choices are poor for a heavy rider who is looking for a set of commuter wheels. If you want to save money, then go with 36H Shimano 105 hubs, Weinmann DP18 rims, and 14G SS DT spokes. You can...
Forum: Touring
06-01-14, 09:29 PM
Replies: 43
Views: 12,307
Posted By furballi

Have the SI Turbo from an older Centurion...

Have the SI Turbo from an older Centurion Ironman. Not very comfortable for longer ride. I prefer a laced Brooks Professional with a flatter top. The Brooks stays firm on longer ride. I don't...
Forum: Bicycle Mechanics
06-01-14, 09:02 PM
Replies: 109
Views: 9,609
Posted By furballi

I try to build wheels with +/-0.001" tolerances...

I try to build wheels with +/-0.001" tolerances (axial and radial). Most important requirement is a "round and flat" rim (+/-0.02" or better would be ideal). Many welded and machined rims tend to...
Forum: Commuting
03-29-14, 07:35 AM
Replies: 75
Views: 4,923
Posted By furballi

Best and most accurate response. One red light...

Best and most accurate response. One red light will cost you around 30 seconds (min). That's a lot of distance to make up at 15 mph.
Forum: Classic & Vintage
08-06-13, 12:29 PM
Replies: 1
Views: 1,080
Posted By furballi

Review Brooks C17 S (ladies)

My friend received her complimentary Cambium C17 S (ladies) in late July. She said it was very comfortable from day one. Since the dimensions of the C17 S are similar to my laced Brooks Pro, I...
Forum: Bicycle Mechanics
04-29-13, 07:30 PM
Replies: 45
Views: 2,715
Posted By furballi

Excessive spoke tension may cause pre-mature...

Excessive spoke tension may cause pre-mature nipple failure due to higher stress/strain at the point where the head transitions to the body of the nipple. We bought many cheap steel wheels in the...
Forum: Bicycle Mechanics
04-29-13, 06:45 AM
Replies: 45
Views: 2,715
Posted By furballi

A good designer always take into account all...

A good designer always take into account all variables before making the appropriate recommendation. The OP has a steel wheel with brass nipple. The chance of nipple failure in this setup is...
Forum: Bicycle Mechanics
04-29-13, 06:41 AM
Replies: 45
Views: 2,715
Posted By furballi

High cycle fatigue is not the root cause if the...

High cycle fatigue is not the root cause if the wheel does not fail after the first 1500 miles. The most likely suspect is corrosion. Brass is more corrosion resistant than aluminum. This is why...
Forum: Bicycle Mechanics
04-28-13, 06:30 PM
Replies: 45
Views: 2,715
Posted By furballi

I'm talking about brass nipples. If the OP was...

I'm talking about brass nipples. If the OP was using aluminum nipples, then the proper course of action would be to extend the spoke length into the head of the nipple. A one size fits all approach...
Forum: Bicycle Mechanics
04-28-13, 06:25 PM
Replies: 45
Views: 2,715
Posted By furballi

You claimed that option #2 is common, but I've...

You claimed that option #2 is common, but I've seen many wheels with brass nipples that fall into this category that have logged may thousand miles without nipple failure. Again, most nipple...
Forum: Bicycle Mechanics
04-28-13, 01:14 PM
Replies: 9
Views: 2,731
Posted By furballi

ERD can vary by +/-2 mm. A pro always check ERD...

ERD can vary by +/-2 mm. A pro always check ERD prior to assembly. A deviation of +/-1 mm from the average value is acceptable. Roundness should be within +/-0.5 mm with a high quality rim.
Forum: Bicycle Mechanics
04-28-13, 01:07 PM
Replies: 44
Views: 14,719
Posted By furballi

It is not possible to service UN54/UN55. These...

It is not possible to service UN54/UN55. These units are are reliable (at least 15K miles in dry climate) but cheaply made to lower production cost. Failure will require investing another $17 for...
Forum: Bicycle Mechanics
04-28-13, 12:56 PM
Replies: 45
Views: 2,715
Posted By furballi

If there is sufficient safety factor built into...

If there is sufficient safety factor built into the design, then the product will not fail. Do you have any knowledge of machine design? This wheel has been exposed to several millions load cycles!...
Forum: Bicycle Mechanics
04-28-13, 08:08 AM
Replies: 45
Views: 2,715
Posted By furballi

I did in post #20. This guy had an older...

I did in post #20. This guy had an older Weinmann concave aluminum rim and ended up ordering spokes that were 2.5-3.0 mm too short. I evaluated the situation and went forward with the build because...
Forum: General Cycling Discussion
04-27-13, 09:52 PM
Replies: 12
Views: 2,375
Posted By furballi

Brooks Imperial Narrow or Pro. I always lace my...

Brooks Imperial Narrow or Pro. I always lace my Brooks to maintain the firmness and shape of the saddle.
Forum: Bicycle Mechanics
04-27-13, 08:52 PM
Replies: 45
Views: 2,715
Posted By furballi

Again, poor metallurlogy could be the root cause...

Again, poor metallurlogy could be the root cause of the nipple failure. You have not provide any scientific data to support your claim. Your assertion is based on data taken 40 years ago on spokes...
Forum: Bicycle Mechanics
04-27-13, 07:19 PM
Replies: 45
Views: 2,715
Posted By furballi

The nipple may fail due to corrosion, undesized...

The nipple may fail due to corrosion, undesized wall thickness and/or inferior metallurlogy (cheap no-name junk import), or damage by a spoke wrench! Cut a DT Swiss brass nipple in half and measure...
Forum: Commuting
04-27-13, 07:52 AM
Replies: 42
Views: 2,219
Posted By furballi

Placebo effect. Cars don't care if you're going...

Placebo effect. Cars don't care if you're going 18 or 20 mph. Adding 2 mph requires a lot more power output, more wear on drive train, and longer stopping distance in case of an emergency. I...
Forum: Bicycle Mechanics
04-27-13, 07:30 AM
Replies: 45
Views: 2,715
Posted By furballi

Perhaps you can educate me about the physics of...

Perhaps you can educate me about the physics of failure mode on the brass nipple. Show your work with concrete data or there will be no point assigned to your hard work. While it is true that the...
Forum: Bicycle Mechanics
04-26-13, 12:09 PM
Replies: 45
Views: 2,715
Posted By furballi

That's irrelevant as long as there are at least...

That's irrelevant as long as there are at least 3-4 good turns for engagement. Feel free to experiment using a tensile testing machine.
Forum: Bicycle Mechanics
04-26-13, 08:03 AM
Replies: 45
Views: 2,715
Posted By furballi

You only need to engage 3-4 turns on the nipples...

You only need to engage 3-4 turns on the nipples to achieve 90% strength. Trueing the wheel with a spoke wrench will add at least another 2-3 turns. Wheel should be fine.
Forum: Road Cycling
04-24-13, 10:38 AM
Replies: 5
Views: 451
Posted By furballi

Should work if you have the proper chain length...

Should work if you have the proper chain length and B-screw adjustment. Experiment with the chain length at 1 or 2 links to find the sweet spot. My short cage Microshift works fine with a 32T...
Forum: Bicycle Mechanics
04-24-13, 10:30 AM
Replies: 29
Views: 3,069
Posted By furballi

Put the part in a glass jar. Work in the yard at...

Put the part in a glass jar. Work in the yard at least 30 feet from open flame. Gasoline-resistant gloves are dirt cheap. Widely available gasoline is one of the best solvent from a...
Forum: Southern California
04-23-13, 08:22 AM
Replies: 29
Views: 2,814
Posted By furballi

Correction...in the CA justice system, a cop who...

Correction...in the CA justice system, a cop who lies is ALWAYS right. The cop and the judge work for the same master. It's all about raking in easy money for the state of CA.
Forum: Classic & Vintage
04-22-13, 01:56 PM
Replies: 31
Views: 7,028
Posted By furballi

Ebay has OK price with free shipping. Look for...

Ebay has OK price with free shipping. Look for the high temperature "red" grease sold at Wal Mart (private label). Price is around $4 for 16 oz. Nice thick grease that keeps the BBs in place...
Forum: Classic & Vintage
04-22-13, 10:10 AM
Replies: 4
Views: 986
Posted By furballi

Check the chain line. Actual could deviate about...

Check the chain line. Actual could deviate about 5 mm from ideal. If you can live with this, then there is no issue other than poor shifting and faster wear of the drivetrain with certain gear...
Forum: General Cycling Discussion
04-21-13, 05:57 PM
Replies: 12
Views: 3,391
Posted By furballi

The most accurate method is to pump up the tires...

The most accurate method is to pump up the tires to the correct pressure. Put a piece of tape on the front tire's tread area. Sit on the bike and line up the tape with the ground. This is point A....
Forum: General Cycling Discussion
04-18-13, 09:28 AM
Replies: 34
Views: 12,013
Posted By furballi

Yes for running red light. No for not carrying...

Yes for running red light. No for not carrying DL. You could provide the DL number, and the cop should be able to check the database. The cop could also get your fingerprint if you don't have an...
Forum: Road Cycling
04-18-13, 08:25 AM
Replies: 57
Views: 4,638
Posted By furballi

Does it takes 4 years for a bad saddle to create...

Does it takes 4 years for a bad saddle to create this problem? If the saddle is comfortable to ride, then it may not be the root cause of your problem. Try riding with a padded short and another...
Forum: Clydesdales/Athenas (200+ lb / 91+ kg)
04-18-13, 08:12 AM
Replies: 3
Views: 627
Posted By furballi

Wheels should work if you ride on smooth roads. ...

Wheels should work if you ride on smooth roads. Bring the wheels to a good shop to make sure the spokes are properly tensioned and stress relieved.

I would not go for a lightweight bike with...
Forum: Classic & Vintage
04-17-13, 10:08 AM
Replies: 18
Views: 9,008
Posted By furballi

Use thicker "green" or "red" grease. Turn the...

Use thicker "green" or "red" grease. Turn the bike upside down to add the balls and fork. Loose balls, unlike caged balls, are not prone to false brinelling.
Forum: Bicycle Mechanics
04-17-13, 08:16 AM
Replies: 26
Views: 1,748
Posted By furballi

Check for worn chain, chain ring, rear...

Check for worn chain, chain ring, rear freewheel/freehub, and loose bottom bracket/cranks. The FD should remain parallel and be as close as possible to the big front chain ring. Confirm that the...
Forum: Touring
04-17-13, 07:47 AM
Replies: 26
Views: 3,580
Posted By furballi

You'll want to tightly lace the saddle to...

You'll want to tightly lace the saddle to minimize the hammock effect. A properly laced B17 shouldn't look like a hammock. Also check out the Brooks Pro (about $90). It's a little narrower than...
Forum: Road Cycling
04-16-13, 12:54 PM
Replies: 31
Views: 2,722
Posted By furballi

Bought a Microshift/Nashbar RD two years ago...

Bought a Microshift/Nashbar RD two years ago (~$24 after 20% off coupon). Unit is still running strong after 12000 miles with very little play. The cheap guide pulleys are still in great working...
Forum: Commuting
04-16-13, 11:38 AM
Replies: 106
Views: 4,858
Posted By furballi

~31 mph of flat with no wind, but only for a few...

~31 mph of flat with no wind, but only for a few seconds. At that speed, about 630 watts is used to overcome air resistance. To hit 37 mph, I have to output about 1050 watts (1.4 hp) to overcome...
Forum: General Cycling Discussion
04-16-13, 10:27 AM
Replies: 34
Views: 12,013
Posted By furballi

Always fight a ticket. As a cyclist, you must...

Always fight a ticket. As a cyclist, you must obey traffic lights. Start out with a "trial by declaration". You write up your version, and the cop must also submit his, or you will win by default....
Forum: Clydesdales/Athenas (200+ lb / 91+ kg)
04-16-13, 07:52 AM
Replies: 17
Views: 2,658
Posted By furballi

You have good brakes if you can lock each wheel...

You have good brakes if you can lock each wheel when riding in the rain. To minimize wear, lightly squeeze on the brakes for 1-2 seconds prior to heavier application. This will allow the pads to...
Forum: Bicycle Mechanics
04-16-13, 07:23 AM
Replies: 12
Views: 9,828
Posted By furballi

My main bikes are Centurion Ironman (23 lbs) and...

My main bikes are Centurion Ironman (23 lbs) and Bridgestone 400 (26 lbs). The Bridgestone has much heavier tires and rims. Nominal cruising speed for both bikes are still between 17-18 mph. ...
Forum: Classic & Vintage
04-15-13, 05:48 PM
Replies: 13
Views: 1,574
Posted By furballi

I have a laced Pro Classic with almost 17K miles....

I have a laced Pro Classic with almost 17K miles. It's still like new with no sign of wear at the rivets. There's no benefit in shaving the skirts if the saddle is laced. The B17 used to be...
Forum: Classic & Vintage
04-15-13, 01:51 PM
Replies: 13
Views: 1,574
Posted By furballi

Only $62 without shipping fee to the US! I also...

Only $62 without shipping fee to the US! I also punch holes and lace my Brooks Pro.
Forum: Bicycle Mechanics
04-15-13, 01:44 PM
Replies: 12
Views: 3,756
Posted By furballi

You'll be lucky to gain 1 mph by switching tires....

You'll be lucky to gain 1 mph by switching tires. Training the MOTOR is FREE.
Forum: Classic & Vintage
04-15-13, 01:14 PM
Replies: 13
Views: 1,574
Posted By furballi

Why waste time restoring when a new Brook Pro...

Why waste time restoring when a new Brook Pro Classic is only $90?

http://www.bike-discount.de/shop/a62074/team-pro-classic-honey.html?lg=en&cr=USD&cn=us&gclid=COSQ4I2uzbYCFaF7QgodODoAmw
Forum: Touring
04-15-13, 09:55 AM
Replies: 31
Views: 4,145
Posted By furballi

I use Michelin City with reflective sidewalls. ...

I use Michelin City with reflective sidewalls. They are relatively cheap (~$28 in the US), and comes with a built-in liner for flat protection. I get about 15K miles of wear from the rear 32c tire....
Forum: Bicycle Mechanics
04-15-13, 09:12 AM
Replies: 7
Views: 930
Posted By furballi

Modern Shimano 105 or better hubs should last...

Modern Shimano 105 or better hubs should last 40000 to 50000 miles if not exposed to rain/mud. Clean and repack with grease and new balls every 5000-6000 miles. I don't ride in the rain, so I only...
Forum: Classic & Vintage
04-15-13, 08:40 AM
Replies: 46
Views: 18,355
Posted By furballi

Open Sports is below Open Pro. It has a pinned...

Open Sports is below Open Pro. It has a pinned joint. QC is very poor due to low price. Wheel should be OK if properly built. Keep spoke tension low due to the thin wall.
Forum: Road Cycling
04-14-13, 09:14 PM
Replies: 21
Views: 1,323
Posted By furballi

A key variable is to reduce friction. Make sure...

A key variable is to reduce friction. Make sure the saddle is not too high. Your hips should not rock from side to side when you pedal. Adjust the fore/aft position of the saddle so that you don't...
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