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Search: Posts Made By: David Tollefson
Showing results 1 to 50 of 148
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Forum: Framebuilders
12-23-20, 02:47 PM
Replies: 27
Views: 3,570
Posted By David Tollefson

Loving that logo design.

Loving that logo design.
Forum: Framebuilders
12-15-20, 12:07 PM
Replies: 7
Views: 3,710
Posted By David Tollefson

Try the rear wheel skewer as well. I had that...

Try the rear wheel skewer as well. I had that issue on an older aluminum MTB -- I even sanded paint off some areas of the frame checking for cracks. Turned out to be the rear wheel skewer not being...
Forum: Framebuilders
11-24-20, 11:06 AM
Replies: 15
Views: 2,435
Posted By David Tollefson

I don't understand why ANYone would put that kind...

I don't understand why ANYone would put that kind of a disc brake mount on any fork blade. At the very least use a Willets style. And that only on fork blades designed for disc brake use.
Forum: Framebuilders
11-02-20, 08:58 AM
Replies: 8
Views: 2,413
Posted By David Tollefson

Take a look at Rob English's interpretation of a...

Take a look at Rob English's interpretation of a folding design. Rather ingenious.
Forum: Framebuilders
08-31-20, 01:29 PM
Replies: 115
Views: 13,872
Posted By David Tollefson

I use a chainsaw chain file -- thinner, and does...

I use a chainsaw chain file -- thinner, and does a very nice job, easy to find that shape then fair it out to the tube. Also, you can drop some silver (Fillet Pro works well) in those low spots...
Forum: Framebuilders
08-31-20, 07:40 AM
Replies: 15
Views: 2,046
Posted By David Tollefson

Could the head tube cups not be manufactured to...

Could the head tube cups not be manufactured to press onto the outside of the tube, rather than the inside?
Forum: Framebuilders
08-19-20, 08:24 AM
Replies: 115
Views: 13,872
Posted By David Tollefson

I developed a different method (out of necessity...

I developed a different method (out of necessity - the rear axle portion of my jog is bent) and thus a different order of assembly. I also do all of it by hand -- hack saw and files, no mitering jig....
Forum: Framebuilders
08-14-20, 05:57 AM
Replies: 18
Views: 3,571
Posted By David Tollefson

I had a previous year Cimarron that cracked in a...

I had a previous year Cimarron that cracked in a similar fashion. That's a repair I wouldn't even attempt. But then again I don't build with lugs.
Forum: Framebuilders
08-04-20, 09:23 AM
Replies: 115
Views: 13,872
Posted By David Tollefson

I ovalize using my vise and soft jaws. Just at...

I ovalize using my vise and soft jaws. Just at the end. Sometimes I'll do a downtube vertically at the HT and horizontally at the BB. Anyway, you only need to do a few inches worth of the tube,...
Forum: Framebuilders
08-04-20, 08:36 AM
Replies: 115
Views: 13,872
Posted By David Tollefson

I often will ovalize the top tube vertically to...

I often will ovalize the top tube vertically to give more area for a fillet. Doesn't take much.
Forum: Framebuilders
07-14-20, 10:14 AM
Replies: 4
Views: 712
Posted By David Tollefson

Everything is putting stresses right at the edge...

Everything is putting stresses right at the edge of the weld -- set screws, pedaling stresses, the weld itself. Most of these that I've seen use a split shell with tension binders (like what's used...
Forum: Framebuilders
07-13-20, 12:52 PM
Replies: 4
Views: 712
Posted By David Tollefson

That's a horrible detail. Not surprised it failed...

That's a horrible detail. Not surprised it failed there.
Forum: Framebuilders
06-25-20, 07:11 AM
Replies: 38
Views: 4,266
Posted By David Tollefson

Here are a couple pics that kinda show what I did...

Here are a couple pics that kinda show what I did with the wide straight stays into a standard hooded dropout:
...
Forum: Framebuilders
06-24-20, 06:59 AM
Replies: 38
Views: 4,266
Posted By David Tollefson

Crimp the end of the chainstay? I've got a road...

Crimp the end of the chainstay? I've got a road bike that I used straight 1" tubing for the chainstays. I crimped one end (actually crimped the tube then cut the tube at the center of the crimp) and...
Forum: Framebuilders
06-11-20, 08:10 AM
Replies: 17
Views: 3,918
Posted By David Tollefson

Not sure where you heard this from -- I've never...

Not sure where you heard this from -- I've never been told anything of the sort.
Forum: Framebuilders
06-01-20, 11:55 AM
Replies: 38
Views: 4,266
Posted By David Tollefson

Yet another reason I like sliding rear dropouts,...

Yet another reason I like sliding rear dropouts, especially for thru-axles. But... For all my builds, I do dropouts before finishing the miter at the BB.
Forum: Framebuilders
04-22-20, 07:18 AM
Replies: 13
Views: 2,423
Posted By David Tollefson

You can use an acetylene tip, but...

You can use an acetylene tip, but propane-specific tips will retain the flame better. I modified an acetylene tip by making a very small countersink around the hole, and it works much better than it...
Forum: Framebuilders
03-10-20, 03:05 PM
Replies: 13
Views: 2,861
Posted By David Tollefson

Sent you an email...

Sent you an email...
Forum: Framebuilders
01-22-20, 09:19 AM
Replies: 21
Views: 1,895
Posted By David Tollefson

My shop is about 300sf, but that's not all frame...

My shop is about 300sf, but that's not all frame manufacturing space -- it includes a fit area which also serves as my trainer set up, and assembly area (think "bike shop service area").
Forum: Framebuilders
12-11-19, 03:20 PM
Replies: 1
Views: 598
Posted By David Tollefson

I've used these...

I've used these (https://www.cycle-frames.com/bicycle-frame-tubing/NOVA-ROAD-OVAL-Disk-Brake-Fork-Blade-.html) 1.1 wall fork blades on a couple disc brake all-road bikes, and mixed then with standard...
Forum: Framebuilders
12-09-19, 07:27 AM
Replies: 18
Views: 4,485
Posted By David Tollefson

If I'm remembering this right, RS has stated on...

If I'm remembering this right, RS has stated on several occasions that he set the BB drop on his jig to 80mm back in around 1980 and hasn't moved it since.
Forum: Framebuilders
12-09-19, 07:19 AM
Replies: 14
Views: 3,504
Posted By David Tollefson

I'm sure there have been more than one builder...

I'm sure there have been more than one builder doing this, but I remember seeing a TiCycles example back about 8 years or so.
Forum: Framebuilders
12-02-19, 08:02 AM
Replies: 19
Views: 4,509
Posted By David Tollefson

I'd only take that bike off his hands for free if...

I'd only take that bike off his hands for free if I needed another bike to lock onto a trainer.
Forum: Framebuilders
10-03-19, 05:49 AM
Replies: 9
Views: 953
Posted By David Tollefson

The Portland show fizzled a couple years ago. I...

The Portland show fizzled a couple years ago. I displayed there the last year it was sponsored by Hopworks and it was held at their (quite large) facility. The next year I also displayed when it was...
Forum: Framebuilders
09-23-19, 02:31 PM
Replies: 13
Views: 3,543
Posted By David Tollefson

My "dimpling tool" is a bench vise, half of a...

My "dimpling tool" is a bench vise, half of a Paragon tube block, and the top of a pipe wrench....
Forum: Framebuilders
09-12-19, 11:30 AM
Replies: 11
Views: 4,254
Posted By David Tollefson

I know it costs more, but as Andy alludes to,...

I know it costs more, but as Andy alludes to, alignment is a one-shot deal with these dropouts. I'd consider using a slider style dropout instead. Paragon has a nice set in stainless (for the part...
Forum: Framebuilders
06-07-19, 12:23 PM
Replies: 20
Views: 6,170
Posted By David Tollefson

I get that, and even after I go through a...

I get that, and even after I go through a fitting, interview, and all that with the customer, I don't cut tubes until the geometry is pinned down with the customer's approval. I might use geometry...
Forum: Framebuilders
06-07-19, 07:11 AM
Replies: 20
Views: 6,170
Posted By David Tollefson

Aren't these two ideas contradictory? That you're...

Aren't these two ideas contradictory? That you're familiar with the geometry but it's not the same as what you're currently riding?



I won't comment on their pricing -- that's their business....
Forum: Framebuilders
06-07-19, 07:01 AM
Replies: 5
Views: 3,669
Posted By David Tollefson

It has never even occurred to me to think of...

It has never even occurred to me to think of receiving a tip for a frame/fork commission. For wrench work, sure, but not for a frame build.
Forum: Framebuilders
05-16-19, 03:14 PM
Replies: 106
Views: 20,851
Posted By David Tollefson

Nice!

Nice!
Forum: Framebuilders
05-09-19, 02:13 PM
Replies: 7
Views: 2,767
Posted By David Tollefson

Be aware that when you start getting high on the...

Be aware that when you start getting high on the seat tube, you might want to use studs rather than the normal bosses so that you don't interfere with seatpost insertion.
Forum: Framebuilders
04-30-19, 02:00 PM
Replies: 14
Views: 4,860
Posted By David Tollefson

I have that same coffee table!

I have that same coffee table!
Forum: Framebuilders
04-29-19, 06:43 AM
Replies: 15
Views: 4,133
Posted By David Tollefson

Not even on the trainer...

Not even on the trainer...
Forum: Framebuilders
04-17-19, 02:40 PM
Replies: 20
Views: 4,857
Posted By David Tollefson

Fill the fork legs with lead shot... [Sorry,...

Fill the fork legs with lead shot...

[Sorry, the day job has my snark on high output today.]
Forum: Framebuilders
04-17-19, 02:38 PM
Replies: 106
Views: 20,851
Posted By David Tollefson

I'll just send out a mass email to all of my...

I'll just send out a mass email to all of my customers. "In the case of propane-use induced frame failures, survivors should contact me directly at..."
Forum: Framebuilders
04-17-19, 07:49 AM
Replies: 106
Views: 20,851
Posted By David Tollefson

I've been using oxy (via medical oxygen...

I've been using oxy (via medical oxygen concentrator)/propane for over 5 years exclusively. Fillet brazing. No problems. News to me if it isn't suitable.
Forum: Framebuilders
04-11-19, 03:15 PM
Replies: 14
Views: 2,482
Posted By David Tollefson

Almost looks like dried linseed oil.

Almost looks like dried linseed oil.
Forum: Framebuilders
04-11-19, 10:19 AM
Replies: 17
Views: 3,564
Posted By David Tollefson

Aircraft Spruce has grab-bag 4130 tube ends. I...

Aircraft Spruce has grab-bag 4130 tube ends. I went that route and got some nice pieces, all at 12" or slightly less in length.
Forum: Framebuilders
04-04-19, 08:40 AM
Replies: 22
Views: 5,141
Posted By David Tollefson

If it were me, and that damage was undisclosed,...

If it were me, and that damage was undisclosed, it would be going right back to the seller.
Forum: Framebuilders
02-06-19, 03:59 PM
Replies: 3
Views: 1,828
Posted By David Tollefson

Rear dropouts that put the chainstay below the rear axle?

I'm looking for some steel dropout options that put the chainstay intersection below the rear axle (10mm QR). I'm only aware of two right now: a plug-type track dropout...
Forum: Framebuilders
01-10-19, 08:33 AM
Replies: 28
Views: 12,162
Posted By David Tollefson

Stupid question: Why not just swap the hub end...

Stupid question: Why not just swap the hub end caps to QR? That conversion usually takes less than 5 minutes on compatible hubs.
Forum: Framebuilders
01-07-19, 07:32 AM
Replies: 2
Views: 890
Posted By David Tollefson

I think the Spyres are only in flat mount now,...

I think the Spyres are only in flat mount now, just FYI in case you didn't know. If you're needing an ISO mount set of Spyres, I might be able to help you out.
Forum: Framebuilders
01-07-19, 07:28 AM
Replies: 7
Views: 1,456
Posted By David Tollefson

This could be added:...

This could be added: https://www.cycle-frames.com/bicycle-frame-tubing/PUMP-PEG-WITH-90-DEGREE-BEND.html
Forum: Framebuilders
01-07-19, 07:26 AM
Replies: 11
Views: 5,866
Posted By David Tollefson

Reamer, facer and cone are spoken for with a...

Reamer, facer and cone are spoken for with a back-up alternate if the first falls through.
Forum: Framebuilders
01-04-19, 07:13 PM
Replies: 11
Views: 5,866
Posted By David Tollefson

Come to think of it... I have the Park 44mm...

Come to think of it... I have the Park 44mm reaming cutter and the "extension" cone (whatever the proper name for that is -- goes over the 1-1/8 cone on the handle set to fit a 44mm head tube), never...
Forum: Framebuilders
01-04-19, 07:02 AM
Replies: 11
Views: 5,866
Posted By David Tollefson

My experience has been that most shops, unless...

My experience has been that most shops, unless they've been around for a LONG time, don't have the tools to do the finish reaming and facing of a frame. Your best bet is to find a local framebuilder...
Forum: Framebuilders
12-05-18, 09:20 AM
Replies: 12
Views: 4,722
Posted By David Tollefson

Straight full-round 5/8" center rod, cone are...

Straight full-round 5/8" center rod, cone are held in place with set screws (paddle-type thumb screws, doesn't take much pressure to hold them in place). No flat on the rod.

Here's a pic of the...
Forum: Framebuilders
12-05-18, 08:44 AM
Replies: 12
Views: 4,722
Posted By David Tollefson

Where to buy jig cones?

My jig is a fairly old NorTac, which has its issues for set-up, but it's what I have and does the job (albeit slowly). My current problem is the head tube cones -- the OD of the cone is too small to...
Forum: Framebuilders
11-27-18, 11:15 AM
Replies: 14
Views: 5,051
Posted By David Tollefson

Vari-Wall has complete diagrams of all their...

Vari-Wall has complete diagrams of all their stays, with bend locations and angles.
Forum: Framebuilders
11-26-18, 03:40 PM
Replies: 5
Views: 1,108
Posted By David Tollefson

Nova head tubes for 1-1/8" steerers are 36.0mm OD...

Nova head tubes for 1-1/8" steerers are 36.0mm OD and 1.1mm thickness. These can be ordered at 600mm length (23.6 inches). Otherwise you can order whatever length you want from Aircraft Spruce of...
Showing results 1 to 50 of 148
 
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