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Search: Posts Made By: Dan Burkhart
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
05-01-24, 11:09 AM
Replies: 22
Views: 384
Posted By Dan Burkhart

Not quite, but it was an extremely tacky grease.

Not quite, but it was an extremely tacky grease.
Forum: Bicycle Mechanics
05-01-24, 10:40 AM
Replies: 22
Views: 384
Posted By Dan Burkhart

I put loose bearings in an Ashtabula crank once,...

I put loose bearings in an Ashtabula crank once, and it was a pain. Never again.
Yeah, it is possible but not worth the effort.
Forum: Bicycle Mechanics
04-28-24, 08:55 AM
Replies: 21
Views: 548
Posted By Dan Burkhart

Clocking, timing or phasing of the gears,...

Clocking, timing or phasing of the gears, whatever you want to call it is necessary in the case of stepped planetary or multiple counter shaft gear trains. I was first exposed to this when I took...
Forum: Bicycle Mechanics
04-26-24, 07:20 AM
Replies: 27
Views: 13,687
Posted By Dan Burkhart

Here is a gear inch comparison between 10/42 and...

Here is a gear inch comparison between 10/42 and 11/42. Both with 38 tooth chain ring and 40/622 tires. The 10 tooth will gain about 10 gear inches at the top end....
Forum: Bicycle Mechanics
04-22-24, 12:34 PM
Replies: 11
Views: 341
Posted By Dan Burkhart

The clutch that engages the driver to the planet...

The clutch that engages the driver to the planet carrier must be failing to engage.
In gears one through 5, the driver transmits input torque to the reduction ring gear and the power flows from that...
Forum: Bicycle Mechanics
04-20-24, 05:48 PM
Replies: 14
Views: 603
Posted By Dan Burkhart

I have worked on hoses and cables routed through...

I have worked on hoses and cables routed through the headset, and believe me, that’s not where you want to start learning about steer tube shortening. I would leave this to the shop.
Forum: Bicycle Mechanics
04-15-24, 06:19 AM
Replies: 15
Views: 758
Posted By Dan Burkhart

What I get from the photo is one missing spoke...

What I get from the photo is one missing spoke and a broken rim. if the hub is in good shape, it can be rebuilt with a new rim, (any 50mm 24 hole rim does not have to be Reynolds).. It's the sort of...
Forum: General Cycling Discussion
04-10-24, 01:29 PM
Replies: 33
Views: 3,758
Posted By Dan Burkhart

There are established shops in the Toronto area...

There are established shops in the Toronto area that are crying for mechanics.
You can put aside the worries of liability and parts sourcing and just go earn a paycheque doing what you love to do...
Forum: Bicycle Mechanics
04-10-24, 01:09 PM
Replies: 39
Views: 1,777
Posted By Dan Burkhart

A Rohloff is indexed in the hub rather than the...

A Rohloff is indexed in the hub rather than the shifter so a bit of compression in the housing doesn’t matter.
Forum: General Cycling Discussion
04-08-24, 07:05 AM
Replies: 44
Views: 1,573
Posted By Dan Burkhart

We are located right on the edge of the path of...

We are located right on the edge of the path of totality, so the total eclipse will only last a few seconds here. good enough for me. I could get a longer look at it by travelling an hour and a half...
Forum: Bicycle Mechanics
04-05-24, 07:02 PM
Replies: 28
Views: 1,168
Posted By Dan Burkhart

Interesting. That may be related to a phenomenon...

Interesting. That may be related to a phenomenon in heavy semi trucks that experience negative off track on curves taken at speed. I have about 4 million miles worth of practical experience with that...
Forum: Bicycle Mechanics
04-05-24, 02:37 PM
Replies: 28
Views: 1,168
Posted By Dan Burkhart

Agree with that. Ideally, the caster and camber...

Agree with that. Ideally, the caster and camber should be tuneable, but that takes some engineering.
Forum: Bicycle Mechanics
04-05-24, 08:23 AM
Replies: 28
Views: 1,168
Posted By Dan Burkhart

The fact that most trike wheels are smallish and...

The fact that most trike wheels are smallish and can be built symmetrically rather than dished helps to alleviate those concerns.
One thing the OP does need to take into account if designing and...
Forum: Bicycle Mechanics
04-04-24, 06:23 AM
Replies: 28
Views: 1,168
Posted By Dan Burkhart

One option is the Sturmey Archer SD series. I...

One option is the Sturmey Archer SD series. I think I would seriously consider these if I was doing a build as the brake is entirely self contained and no caliper mounts required....
Forum: Bicycle Mechanics
04-03-24, 05:54 AM
Replies: 17
Views: 516
Posted By Dan Burkhart

You are absolutely correct. I made anti rotation...

You are absolutely correct. I made anti rotation mounting tabs for both sides of the wheel that fit over the axle flats and mount to the threaded bosses fore and aft of the dropout. I will grab a...
Forum: Bicycle Mechanics
04-02-24, 05:06 AM
Replies: 17
Views: 516
Posted By Dan Burkhart

I built a front hub motor bike for my wife 12 or...

I built a front hub motor bike for my wife 12 or 13 years ago and while I wouldn’t call it nimble it handles ok and she loves it.
I used a 350 watt motor. Don’t think I would want much more power up...
Forum: Classic & Vintage
04-01-24, 11:12 AM
Replies: 18
Views: 922
Posted By Dan Burkhart

This bike actually rides pretty nice. I added a...

This bike actually rides pretty nice.
I added a couple of accessories to make it a useful daily rider.
For that, it needed a bottle cage and a rear rack....
Forum: Bicycle Mechanics
03-27-24, 09:39 AM
Replies: 26
Views: 949
Posted By Dan Burkhart

J.A. Stein also makes a version of it. I have one...

J.A. Stein also makes a version of it. I have one of those along with an extractor tool.
EDIT: Guess it was already mentioned, but I will say +1 to those that say it works well.
Forum: Bicycle Mechanics
03-25-24, 07:35 PM
Replies: 99
Views: 3,503
Posted By Dan Burkhart

Correct. Internally geared hubs have over 120...

Correct. Internally geared hubs have over 120 years of history.
Forum: Bicycle Mechanics
03-25-24, 09:48 AM
Replies: 99
Views: 3,503
Posted By Dan Burkhart

It has been done. 30 some years ago, Sachs...

It has been done. 30 some years ago, Sachs introduced the Orbit which was a two speed internal paired with a 6 or 7 speed cassette. They followed that up with a three speed version and Sturmey Archer...
Forum: Classic & Vintage
03-24-24, 07:35 PM
Replies: 9
Views: 1,507
Posted By Dan Burkhart

I met Gordon several years ago at the Milton...

I met Gordon several years ago at the Milton velodrome. Interesting fellow. RIP.
Forum: Bicycle Mechanics
03-24-24, 09:20 AM
Replies: 13
Views: 759
Posted By Dan Burkhart

Yeah DT hubs are kind of like golf. Low number...

Yeah DT hubs are kind of like golf. Low number better.
Forum: Classic & Vintage
03-22-24, 02:02 PM
Replies: 18
Views: 922
Posted By Dan Burkhart

All done. Turned out pretty nice. New parts...

All done. Turned out pretty nice.
New parts include tires, tubes, rims, spokes, chain,5 speed freewheel, new axle in rear hub, brake pads, cables and housings.
No test ride today because the winter...
Forum: Classic & Vintage
03-16-24, 07:12 PM
Replies: 18
Views: 922
Posted By Dan Burkhart

About an hour on the buffing wheel and the rims...

About an hour on the buffing wheel and the rims are almost back to their original lustre....
Forum: Classic & Vintage
03-16-24, 09:41 AM
Replies: 18
Views: 922
Posted By Dan Burkhart

Well, winter has flashed by, and I got so busy I...

Well, winter has flashed by, and I got so busy I could only dedicate a few short minutes to the project. January had me busy building wheels the whole month, and February saw me away in the sunny...
Forum: Bicycle Mechanics
03-07-24, 03:34 PM
Replies: 24
Views: 794
Posted By Dan Burkhart

I bought a litre each of the flush oil and the...

I bought a litre each of the flush oil and the hub oil about 20 years ago. Still have most of it....
Forum: Bicycle Mechanics
03-07-24, 11:38 AM
Replies: 24
Views: 794
Posted By Dan Burkhart

I have never used anything but Rohloff oil in my...

I have never used anything but Rohloff oil in my own, or customer's Rohloff hubs. I don't mind experimenting with cheaper units, but not with these high priced gems.
Forum: Bicycle Mechanics
03-07-24, 07:14 AM
Replies: 24
Views: 794
Posted By Dan Burkhart

I think you are referencing a comment I made...

I think you are referencing a comment I made regarding ATF used in place of OEM oil in a Shimano Alfine 11 speed hub. That hub is oil bath from the factory, but the oil is specially formulated to be...
Forum: Bicycle Mechanics
03-05-24, 05:29 AM
Replies: 30
Views: 10,970
Posted By Dan Burkhart

Zombie thread. Take a look at how it was...

Zombie thread. Take a look at how it was resurrected.
Forum: Bicycle Mechanics
03-04-24, 10:42 AM
Replies: 10
Views: 363
Posted By Dan Burkhart

Is the washer also out of round? Most threaded...

Is the washer also out of round? Most threaded steerers have a key slot for a tabbed washer, but some older ones had a flat milled on one side for a matching washer to prevent rotation. I don't see a...
Forum: Bicycle Mechanics
03-03-24, 08:00 AM
Replies: 34
Views: 1,195
Posted By Dan Burkhart

That’s the model BSA cloned and produced into the...

That’s the model BSA cloned and produced into the mid 50s
Forum: Bicycle Mechanics
03-02-24, 08:38 PM
Replies: 34
Views: 1,195
Posted By Dan Burkhart

The real masterminds are the people who design...

The real masterminds are the people who design and build these things. I just have fun figuring out how they work.
Forum: Bicycle Mechanics
03-02-24, 04:12 PM
Replies: 46
Views: 1,460
Posted By Dan Burkhart

I would agree that this really does nothing to...

I would agree that this really does nothing to stress relieve. All it really does is reduce the tension to allow any spoke windup to unwind.
Forum: Bicycle Mechanics
03-02-24, 04:07 PM
Replies: 34
Views: 1,195
Posted By Dan Burkhart

Thanks, but you know the definition of an expert,...

Thanks, but you know the definition of an expert, right? The clue is in the first two letters.
Forum: Bicycle Mechanics
03-02-24, 04:06 PM
Replies: 34
Views: 1,195
Posted By Dan Burkhart

A minor point, but it is not actually the gear...

A minor point, but it is not actually the gear teeth that are subject to damage, but the engagement pawls that couple the sun gears to the axle and the internal splines on the sun gears that can take...
Forum: Bicycle Mechanics
03-02-24, 02:37 PM
Replies: 34
Views: 1,195
Posted By Dan Burkhart

The most important oil change is the first one...

The most important oil change is the first one and should definitely be done on schedule.
I serviced one recently that the owner had used ATF instead of the Shimano oil. I don’t believe that the...
Forum: Bicycle Mechanics
02-29-24, 11:10 AM
Replies: 35
Views: 1,329
Posted By Dan Burkhart

Welcome to the world of functional vs cosmetic...

Welcome to the world of functional vs cosmetic true.
To be functionally true. Lateral and radial deviation of one millimeter or more would not present a problem even with rim brakes. As pointed out...
Forum: Bicycle Mechanics
02-28-24, 06:03 AM
Replies: 16
Views: 477
Posted By Dan Burkhart

The above tool only works for standard nipples...

The above tool only works for standard nipples that can be accessed on the hub side and I only use it for extreme deep rims like 86mm or more.
the vast majority of those deep rims I build with...
Forum: Bicycle Mechanics
02-27-24, 07:20 PM
Replies: 16
Views: 477
Posted By Dan Burkhart

https://cimg4.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg4.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1504/ef2e7dd0_4353_4c37_84e4_47f3e84481b8_76b6b828812f9faeeed83270581f6483cbba80a4.jpeg
This is the tool I made for the job. A spoke bent...
Forum: Bicycle Mechanics
02-25-24, 07:34 PM
Replies: 10
Views: 447
Posted By Dan Burkhart

I realized I mis spoke when I talked about...

I realized I mis spoke when I talked about increased tension with the meter applied.
I meant to say the scale reading increased. I corrected my post in hopes it makes more sense.
Forum: Bicycle Mechanics
02-25-24, 07:26 PM
Replies: 16
Views: 477
Posted By Dan Burkhart

Of course for maximum accuracy, the OP can always...

Of course for maximum accuracy, the OP can always measure ERD with spokes terminated at the desired position in the double square nipples.
Optimum benefit of building with double square is achieved...
Forum: Bicycle Mechanics
02-25-24, 07:36 AM
Replies: 10
Views: 447
Posted By Dan Burkhart

The increase in the scale reading with the meter...

The increase in the scale reading with the meter applied wouldn't produce an error because it returns to normal.
I was just interested to see how it compares to the increase I observe on my...
Forum: Bicycle Mechanics
02-24-24, 04:46 PM
Replies: 10
Views: 447
Posted By Dan Burkhart

Did you compare how much the reading on the scale...

Did you compare how much the reading on the scale increased with the new spring as compared to the original one?
Not that it matters if you are properly calibrated but it would be interesting to see...
Forum: Bicycle Mechanics
02-24-24, 11:55 AM
Replies: 16
Views: 477
Posted By Dan Burkhart

If you want a general rule of thumb, which in...

If you want a general rule of thumb, which in this case I have found to be quite reliable, adding 2 mm to the spoke length as calculated for standard nipples works for double square.
Forum: Bicycle Mechanics
02-24-24, 09:04 AM
Replies: 10
Views: 447
Posted By Dan Burkhart

My Wheel Fanatyc meter usually registers in...

My Wheel Fanatyc meter usually registers in the.29 to .35 mm range across a range of spoke types and thicknesses at my target tension which is a far smaller deflection range than my other meters...
Forum: Bicycle Mechanics
02-21-24, 11:12 AM
Replies: 10
Views: 371
Posted By Dan Burkhart

I don’t worry if they touch or rub each other...

I don’t worry if they touch or rub each other because the contact is very light. I prefer they don’t touch or rub the frame.
Forum: Bicycle Mechanics
02-21-24, 11:08 AM
Replies: 12
Views: 378
Posted By Dan Burkhart

I think you are referring to the conventional...

I think you are referring to the conventional wisdom that says you build to the higher tension side first. It does not apply to a symmetrical wheel.
Forum: Bicycle Mechanics
02-21-24, 07:23 AM
Replies: 10
Views: 371
Posted By Dan Burkhart

For me, the deciding factor is how cleanly and...

For me, the deciding factor is how cleanly and neatly the loop from the levers to the down tube can be made. This can be affected by the shape and length of the handlebar, the length of the stem,and...
Forum: Bicycle Mechanics
02-21-24, 05:37 AM
Replies: 94
Views: 3,435
Posted By Dan Burkhart

What everyone so far has failed to grasp is that...

What everyone so far has failed to grasp is that track wheels usually do not have enough axle protrusion with the stock axle to accommodate a multi speed freewheel, even a five speed one.. if the hub...
Forum: Bicycle Mechanics
02-20-24, 12:42 PM
Replies: 5
Views: 238
Posted By Dan Burkhart

The cap sometimes takes a bit of force to remove...

The cap sometimes takes a bit of force to remove but I have never broken one.
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