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Search: Posts Made By: guy153
Showing results 1 to 50 of 950
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Forum: Framebuilders
04-18-24, 02:10 PM
Replies: 2
Views: 140
Posted By guy153

I'm pretty sure stack and reach are measured...

I'm pretty sure stack and reach are measured relative to the BB, so a higher BB won't give you a higher stack. 18mm reach is within the range of what you could adjust with the stem. 2" less stack is...
Forum: Framebuilders
04-14-24, 03:10 PM
Replies: 3
Views: 187
Posted By guy153

My (very limited) understanding is that colour...

My (very limited) understanding is that colour layers that are all 1k should be reapplied either when not completely dry, like after half an hour or so, or when totally dry, like a few days, but...
Forum: Framebuilders
04-13-24, 11:04 AM
Replies: 25
Views: 764
Posted By guy153

I made my first frame (which was for me...

I made my first frame (which was for me obviously) according to the traditional Italian principle of make the ST the same length as the TT. It seemed to fit perfectly so I stick roughly to that. Most...
Forum: Framebuilders
04-10-24, 08:50 AM
Replies: 6
Views: 260
Posted By guy153

In theory it's possible as the crack is in the...

In theory it's possible as the crack is in the thick part of the tube where the butt is. You might want to gouge it out a little bit with a die grinder to make sure you get the weld all the way...
Forum: Framebuilders
03-22-24, 03:32 AM
Replies: 8
Views: 425
Posted By guy153

You should include it in your design (whether you...

You should include it in your design (whether you do that on paper or inside the confuser) because it affects the head-tube angle, seat-tube angle, and everything else. If you don't know exactly what...
Forum: Framebuilders
03-16-24, 02:23 AM
Replies: 32
Views: 999
Posted By guy153

The shimmying bike in the video is likely to be...

The shimmying bike in the video is likely to be perfectly aligned. Of course we don't know this but it's a custom build by someone who looks like he knows what he's doing. However it still sounds...
Forum: Framebuilders
03-15-24, 07:42 AM
Replies: 32
Views: 999
Posted By guy153

Thanks. This makes a lot of sense. And reading a...

Thanks. This makes a lot of sense. And reading a bit about motorcycle shimmy it sounds plausible that trail is important. The two bicycles being compared by HW had very different trails (the...
Forum: Framebuilders
03-14-24, 11:03 AM
Replies: 32
Views: 999
Posted By guy153

The bike that Henry Wildeberry had built for Ms...

The bike that Henry Wildeberry had built for Ms Cools (by John Fitzgerald) does have 28.6mm TT and DT. I could be wrong but I think it was Rivendell who first started this trend for oversizing only...
Forum: Framebuilders
03-12-24, 10:50 AM
Replies: 32
Views: 999
Posted By guy153

I also like standard sizing. Commercial frames...

I also like standard sizing. Commercial frames are often too stiff. I don't see why you want that unless you are actually racing (sprinting), in which case you wouldn't have a steel bike anyway. But...
Forum: Framebuilders
03-12-24, 10:44 AM
Replies: 32
Views: 999
Posted By guy153

I should say with TIG the DT, TT and bottom of...

I should say with TIG the DT, TT and bottom of the ST are usually 0.8mm (or less) at the ends, and the seatstays often thinner. But all the joints have at least one thicker tube involved (except for...
Forum: Framebuilders
03-12-24, 04:18 AM
Replies: 32
Views: 999
Posted By guy153

If it's Columbus it's probably weldable. But just...

If it's Columbus it's probably weldable. But just make sure that for TIG you have the thickness you need. You generally want about a 1.2mm wall HT and 1.2mm at the top of the ST (which is often...
Forum: Framebuilders
03-06-24, 10:46 AM
Replies: 17
Views: 632
Posted By guy153

Yes you do need vent holes unless you want your...

Yes you do need vent holes unless you want your weld spitting back out at you at the end. Agree they should be on the inside, where they don't affect the strength at all. You don't need to vent both...
Forum: Framebuilders
03-06-24, 01:38 AM
Replies: 17
Views: 632
Posted By guy153

That's interesting. I think people usually use...

That's interesting. I think people usually use 1.0mm cromoly or 1.6mm mild steel for handlebar stems. Those are a single cantilever and usually longer. So 1.6mm cromoly for crown segments ought to be...
Forum: Framebuilders
03-05-24, 12:58 PM
Replies: 17
Views: 632
Posted By guy153

I get them directly from Reynolds being in the...

I get them directly from Reynolds being in the UK. These are the EX5707 blades (the most curved and the thinnest). Make sure that if you're using a disk brake you get the slightly thicker ones...
Forum: Framebuilders
03-05-24, 12:56 PM
Replies: 17
Views: 632
Posted By guy153

The 1" steerer used for the "arms" is a Columbus...

The 1" steerer used for the "arms" is a Columbus one that's 2.3mm at one end and 1.55mm at the other. I think I used pieces from the "thin" end (which is still quite thick). That one steerer has made...
Forum: Framebuilders
03-05-24, 07:15 AM
Replies: 17
Views: 632
Posted By guy153

You could also consider making a segmented fork....

You could also consider making a segmented fork. These are quite fun to do and can be done with either TIG or fillet brazing. I use TIG and make the arms out of 1" cromoly steerer tube. The caps are...
Forum: Framebuilders
02-07-24, 11:28 AM
Replies: 6
Views: 459
Posted By guy153

You could run it as a fixed gear? Sorry I'm not...

You could run it as a fixed gear? Sorry I'm not more helpful about the carbon fibre repair, don't really know anything about that :)
Forum: Framebuilders
02-03-24, 06:07 AM
Replies: 21
Views: 918
Posted By guy153

The stiffness of the metal is the same. But yes...

The stiffness of the metal is the same. But yes if it's yielded (as opposed to actually broken) the geometry is different so the spring will behave a bit differently. But a B spring won't yield in...
Forum: Framebuilders
01-19-24, 07:45 PM
Replies: 23
Views: 885
Posted By guy153

Agree that it's all about what you're used to....

Agree that it's all about what you're used to. Personally I can get a better and faster mitre with a grinder than a file but I don't assume this applies to everyone. And I am still at the paper...
Forum: Framebuilders
01-19-24, 08:39 AM
Replies: 23
Views: 885
Posted By guy153

Yes and no :) If it's a straightforward mitre...

Yes and no :) If it's a straightforward mitre it's very good, like you can't see any light there and it's really touching all the way around. But, especially on some of my earlier frames, I have had...
Forum: Framebuilders
01-18-24, 03:37 AM
Replies: 23
Views: 885
Posted By guy153

I know it's not the traditional framebuilder tool...

I know it's not the traditional framebuilder tool but I like it and use it for nearly everything. I don't have to worry about tube blocks because I can just hold a tube with one hand and cut it with...
Forum: Framebuilders
01-17-24, 11:00 AM
Replies: 23
Views: 885
Posted By guy153

I mean these things: ...

I mean these things:

https://www.amazon.co.uk/Removal-Grinder-Abrasive-Grinders-Materials/dp/B08MVLHR87

They're very good at taking off the paint and only the paint. If you're actually...
Forum: Framebuilders
01-17-24, 03:06 AM
Replies: 23
Views: 885
Posted By guy153

I still practice on all my drops :) And often use...

I still practice on all my drops :) And often use the ends of stays for bridge tubes. I just took the paint (it was powder coat) off with a "birds nest" wheel on a grinder which didn't take long.
Forum: Framebuilders
01-16-24, 02:24 PM
Replies: 23
Views: 885
Posted By guy153

I would practice on old bike frames. I happened...

I would practice on old bike frames. I happened to have a 4130 Trek that broke. By the time I'd cut it up into pieces a few inches long and welded them back together again at various angles I just...
Forum: Framebuilders
01-15-24, 11:19 AM
Replies: 7
Views: 430
Posted By guy153

That seems to be the solution I'm converging on....

That seems to be the solution I'm converging on. I had one of those plastic things but it doesn't seem to fit very well so I'm using these "cable tunnel" things (ART 146 and 144) which I already have...
Forum: Framebuilders
01-14-24, 12:02 PM
Replies: 21
Views: 918
Posted By guy153

Thank goodness for the internet :) I remember the...

Thank goodness for the internet :) I remember the dark days before we had it and people went around believing weird myth and lore like this because some old guy in a bike shop told them. Another...
Forum: Framebuilders
01-14-24, 11:46 AM
Replies: 7
Views: 430
Posted By guy153

Yes I think my flat mount is less "flat" than...

Yes I think my flat mount is less "flat" than dsaul's. I made it by modifying a post-mount dropout (described in this earlier thread):

https://www.bikeforums.net/23086583-post16.html

But...
Forum: Framebuilders
01-13-24, 09:47 AM
Replies: 7
Views: 430
Posted By guy153

Flat-mount caliper cable routing?

This is my rear caliper, which is cable-operated. But what's the best way to run the cable for this? Outer cable all the way? From the lever, down the downtube, and under the BB shell? Or over the BB...
Forum: Framebuilders
01-03-24, 11:07 AM
Replies: 43
Views: 2,381
Posted By guy153

Nice work! It's possible that the first bend you...

Nice work! It's possible that the first bend you made actually happened in the BB lug. I have heard they can be quite floppy (and the "old school" system of frame alignment kind of assumes this).
Forum: Framebuilders
01-02-24, 03:46 AM
Replies: 12
Views: 664
Posted By guy153

I just had a very similar experience, but with...

I just had a very similar experience, but with less excuse. Gravel-style frame with 26" wheels but road cranks. This means a 68mm shell but I also hadn't realized just how much closer together the...
Forum: Framebuilders
12-19-23, 03:23 AM
Replies: 7
Views: 505
Posted By guy153

What if you glue an aluminium plate to the carbon...

What if you glue an aluminium plate to the carbon first and then drill through the whole lot in one go? The idea being that the glue will stop the hole chowdering up into splinters of death as you...
Forum: Framebuilders
12-18-23, 02:47 AM
Replies: 9
Views: 668
Posted By guy153

Beautiful job! Do the chainrings still fit?

Beautiful job! Do the chainrings still fit?
Forum: Framebuilders
12-16-23, 07:47 AM
Replies: 11
Views: 525
Posted By guy153

+1 for it looks fine. People put much bigger...

+1 for it looks fine. People put much bigger dimples in chainstays all the time, and also drill top-tubes for internal cables (a hole is much worse than a dent, which just reduces the stiffness a bit...
Forum: Framebuilders
12-12-23, 04:11 AM
Replies: 32
Views: 1,466
Posted By guy153

There's a lot to be said for 26" on a touring...

There's a lot to be said for 26" on a touring bike anyway. Easier to get parts when riding across the Hindu Kush. The opposite is probably true of 650b. It also makes much more sense than 700c if...
Forum: Framebuilders
12-10-23, 10:24 AM
Replies: 32
Views: 1,466
Posted By guy153

When it comes to level TTs I quite like them all...

When it comes to level TTs I quite like them all things being equal, but I dislike excessive stickout of stems (or seatposts) even more. So my least favourite is the modern "road" frame with a really...
Forum: Framebuilders
12-10-23, 05:46 AM
Replies: 32
Views: 1,466
Posted By guy153

I think the best way to reduce reach is to use a...

I think the best way to reduce reach is to use a slack head angle with lots of rake (to get the trail back to a sensible figure), and a short stem. If you want a high stack I would go with a sloping...
Forum: Framebuilders
12-10-23, 05:28 AM
Replies: 32
Views: 1,466
Posted By guy153

I think that might be unrideable to someone used...

I think that might be unrideable to someone used to a regular bike. But with a lot of practice it could be ridden. Would certainly be an interesting experiment though :)
Forum: Framebuilders
12-05-23, 04:33 PM
Replies: 24
Views: 800
Posted By guy153

There's a lot hidden in that section... including...

There's a lot hidden in that section... including some flat caliper mounts :) I just made my own.
Forum: Framebuilders
12-04-23, 04:32 PM
Replies: 8
Views: 417
Posted By guy153

Thanks for all the advice! I could just get a...

Thanks for all the advice! I could just get a clamp, but it's an unusually large seat tube (32.7mm OD). I was planning to TIG braze a tab on with basically a fillet on each side so it probably won't...
Forum: Framebuilders
12-04-23, 07:52 AM
Replies: 8
Views: 417
Posted By guy153

Front derailleur braze-on

I have a braze-on front derailleur so am planning to make or buy the hanger that goes on the frame and braze it on. Does anyone know the standard for where it's supposed to go? Obviously I'll make...
Forum: Framebuilders
11-30-23, 09:53 AM
Replies: 15
Views: 556
Posted By guy153

OK some reinforcement. First step was to delete...

OK some reinforcement. First step was to delete that pesky hole, with a little fiddly piece of 3mm plate shaped to fit into the hole and given a beveled edge:
...
Forum: Framebuilders
11-29-23, 04:47 AM
Replies: 15
Views: 556
Posted By guy153

I'm now wondering if I need to add a little bit...

I'm now wondering if I need to add a little bit more support. It's only a back brake but still potentially quite a high force trying to bend my new tab down, because it's about 5x higher at the disk...
Forum: Framebuilders
11-28-23, 10:45 AM
Replies: 15
Views: 556
Posted By guy153

Well here's how I got on. I think it worked out...

Well here's how I got on. I think it worked out very well. I drilled a couple of 5mm holes in my trusty bit of 5mm plate, and then widened them into slots with that carbide burr thing:


...
Forum: Framebuilders
11-28-23, 07:24 AM
Replies: 15
Views: 556
Posted By guy153

Thanks! But I'm in UK. The cost would be rather a...

Thanks! But I'm in UK. The cost would be rather a lot. Plus it will be quite fun to try and make something.
Forum: Framebuilders
11-27-23, 04:29 PM
Replies: 15
Views: 556
Posted By guy153

The caliper set I have only comes with one of...

The caliper set I have only comes with one of those adaptor plates. Could always get another one from somewhere (or make one) but the other benefit of making a rear-style mount is the spacing is only...
Forum: Framebuilders
11-27-23, 12:54 PM
Replies: 15
Views: 556
Posted By guy153

I already made the front one out of 5mm plate,...

I already made the front one out of 5mm plate, which is deep enough to put the bolts into, so I didn't drill anything into the fork. I'm happy with it.
...
Forum: Framebuilders
11-27-23, 11:29 AM
Replies: 15
Views: 556
Posted By guy153

I probably could make something a bit more...

I probably could make something a bit more slot-like by drilling two holes in some 5mm plate instead and then joining them up with some filing etc. Then I could use one flat piece of plate. There's...
Forum: Framebuilders
11-27-23, 10:12 AM
Replies: 15
Views: 556
Posted By guy153

Thanks! Are you sure 4mm x 5.2mm? It's an M5 bolt...

Thanks! Are you sure 4mm x 5.2mm? It's an M5 bolt so 4mm seems too narrow. Assuming that diagram is to scale I make them about 5.2mm x 6.9mm. I could try and file a non-round hole but it probably...
Forum: Framebuilders
11-27-23, 06:50 AM
Replies: 15
Views: 556
Posted By guy153

Flat mount caliper-- how big should the holes through the chainstay be?

The way the rear caliper mounts with flat mount is with a couple of M5 bolts going through the chainstay. I actually have the DRO3 dropouts from here:
...
Forum: Framebuilders
11-21-23, 03:01 AM
Replies: 16
Views: 708
Posted By guy153

I TIG everything and I use silicon bronze between...

I TIG everything and I use silicon bronze between where the two seat stays join at the top if it is too tight to weld it there. It's fairly easy to sort of fill that gap with TIG bronze if you...
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