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Search: Posts Made By: guy153
Showing results 1 to 50 of 561
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04-21-21, 11:37 AM
Replies: 68
Views: 5,892
Posted By guy153

Good question, I'm not sure. I think if you have...

Good question, I'm not sure. I think if you have a wider handlebar (the ones currently used on MTBs are ridiculously wide) you probably want longer trail. Increasing the trail kind of gears up the...
Forum: Framebuilders
04-19-21, 12:31 PM
Replies: 10
Views: 513
Posted By guy153

I also mitre by hand. It's not a difficult mitre....

I also mitre by hand. It's not a difficult mitre. Most important is that the chainstays are exactly the same length, or the back wheel won't sit right. You can only do this if you can fixture it...
04-09-21, 12:39 PM
Replies: 15
Views: 403
Posted By guy153

There's a guy on YouTube called CYCLINGABOUT who...

There's a guy on YouTube called CYCLINGABOUT who goes on long tours in places like Patagonia. Really nice channel and beautiful scenery. Anyway he loves belt drives (and they do work really well for...
Forum: Framebuilders
04-09-21, 02:37 AM
Replies: 23
Views: 23,653
Posted By guy153

Head tubes are thicker than 1mm even on nice...

Head tubes are thicker than 1mm even on nice bikes. I'm sure you're right the other tubes are thicker. I'm just going by the "Mistral Tourist" (which was brazed but low end PG tubing with a visible...
Forum: Framebuilders
04-08-21, 04:50 PM
Replies: 77
Views: 6,187
Posted By guy153

Yikes. Any ride that ends with saying "but you...

Yikes. Any ride that ends with saying "but you should have seen the tree" is not a good one. Hope you recover soon and get back in the shop and on the trail!
Forum: Framebuilders
04-08-21, 04:44 PM
Replies: 23
Views: 23,653
Posted By guy153

A lot of low-end Walmart style bikes are MIG...

A lot of low-end Walmart style bikes are MIG welded, sometimes by robots probably. Probably 1mm wall rolled up mild steel tubing.
Forum: Framebuilders
04-03-21, 10:25 AM
Replies: 9
Views: 537
Posted By guy153

I generate two mitre templates, one for DT to BB...

I generate two mitre templates, one for DT to BB and one for DT to ST. Then my CAD software tells me the offset between them on the DT inside centreline in this case 11.29mm. So then I can trace them...
04-02-21, 02:35 AM
Replies: 38
Views: 1,137
Posted By guy153

Well the customer was only me :) Drifting off...

Well the customer was only me :) Drifting off topic here but I don't like disks on road bikes. I like the symmetry and elegance of light-weight fork blades and stays with braking forces going through...
04-01-21, 03:20 PM
Replies: 38
Views: 1,137
Posted By guy153

Well the last frame I built in 2021 had...

Well the last frame I built in 2021 had canti/V-brake bosses :)
Forum: Framebuilders
04-01-21, 03:06 AM
Replies: 115
Views: 7,435
Posted By guy153

I'm thinking why not make something only about a...

I'm thinking why not make something only about a foot wide-- about the size of the cardboard boxes that frames ship in (except made of metal not cardboard obviously...). Then you really just need a...
Forum: Framebuilders
03-31-21, 05:15 PM
Replies: 115
Views: 7,435
Posted By guy153

Thanks! I might try Montana. I've used 2k clear...

Thanks! I might try Montana. I've used 2k clear on the last couple of frames. It doesn't seem particularly robust either. I thought you might have done the paint yourself as I could see some tiny...
Forum: Framebuilders
03-31-21, 02:54 PM
Replies: 115
Views: 7,435
Posted By guy153

It looks amazing! Did you paint it yourself and...

It looks amazing! Did you paint it yourself and with what paint?
03-30-21, 11:17 AM
Replies: 38
Views: 1,137
Posted By guy153

Yes that's the conclusion I've come to. Touring...

Yes that's the conclusion I've come to. Touring bikes are often a weird mix of road and MTB parts but I think I'll just go MTB with everything. Probably 68/135 unless the crankset is expecting 73...
03-29-21, 02:23 PM
Replies: 38
Views: 1,137
Posted By guy153

It is for someone else but it's my second TA...

It is for someone else but it's my second TA build. And the last 3 frames did not require any last-minute dropout-filing for alignment (which you obviously can't do with TAs) so I think I've got the...
03-29-21, 07:39 AM
Replies: 38
Views: 1,137
Posted By guy153

Thanks for the answers everyone! That clears...

Thanks for the answers everyone! That clears things up a lot. I did see a few 135 QR disk hubs so I'll think about whether to go with those or with "road" stuff and thru-axles. I'm assuming MTB disk...
03-29-21, 05:16 AM
Replies: 38
Views: 1,137
Posted By guy153

Are QR Disk Hubs dead?

So I'm building a new frame on which I ideally wanted disk brakes with QR axles. Yes I know about wheel ejection but I know how to do up a QR and I consider life to be complicated enough without...
Forum: Framebuilders
03-28-21, 11:33 AM
Replies: 37
Views: 2,188
Posted By guy153

Those are fine choices but an angle grinder with...

Those are fine choices but an angle grinder with a cutoff wheel will do the job. As for making decent welds yes a bit of practice. The best thing for anyone starting out is break tests. If your welds...
Forum: Framebuilders
03-28-21, 03:19 AM
Replies: 26
Views: 1,500
Posted By guy153

That bimetallic insert may well have been made...

That bimetallic insert may well have been made using explosion welding. That's the kind of thing they use it for-- fusing a big sheet of steel to one of aluminium back to back.
Forum: Framebuilders
03-25-21, 04:30 PM
Replies: 4
Views: 337
Posted By guy153

If it's external butted you can just TIG weld...

If it's external butted you can just TIG weld right onto that. That's basically why they do that. Obviously make sure you cut any extra tube you don't need off the bottom so you're keeping the fat...
Forum: Framebuilders
03-24-21, 02:50 AM
Replies: 12
Views: 748
Posted By guy153

The one I made had a longer CS (450) but a...

The one I made had a longer CS (450) but a shorter front-centre (776). Total wheelbase 1218. So not far off your limit! You're right people often do go with a short CS. I think that's why the design...
Forum: Framebuilders
03-22-21, 10:35 AM
Replies: 12
Views: 748
Posted By guy153

Go as long as you can. It's not just CS length...

Go as long as you can. It's not just CS length you have to worry about. If you ever make a "long low slack" MTB even in a medium-ish size you can end up with a DT 750mm long (as opposed to about...
Forum: Framebuilders
03-22-21, 03:34 AM
Replies: 21
Views: 880
Posted By guy153

They created such a myth around 753. As you say...

They created such a myth around 753. As you say since it was stronger the idea is to make it thinner. I think they did do that for the rest of the frame if not the fork. But then they brought out...
Forum: Framebuilders
03-20-21, 11:04 AM
Replies: 11
Views: 570
Posted By guy153

Cromoly is a kind of steel and will braze to the...

Cromoly is a kind of steel and will braze to the lugs just fine. If you're in the UK I've not found anywhere I can buy generic cromoly at a better price than the actual bike tubes you can get from...
Forum: Framebuilders
03-20-21, 10:58 AM
Replies: 11
Views: 739
Posted By guy153

I'm going to go with aluminium for that one. But...

I'm going to go with aluminium for that one. But it does look like the welds on the main triangle have been cleaned up so it's not so obvious.
03-20-21, 03:41 AM
Replies: 68
Views: 5,892
Posted By guy153

This is the design currently (based off the...

This is the design currently (based off the fitting bike) although it will be refined a bit. It certainly looks quite unusual! I've ordered the handlebar (a swept back one) so will do another fit...
Forum: Framebuilders
03-17-21, 11:32 AM
Replies: 37
Views: 2,188
Posted By guy153

Seriously it's not hard. "Too old to learn", and...

Seriously it's not hard. "Too old to learn", and "almost middle-aged" does not compute. You don't need to go on a class. I learnt everything from YouTube and have made several bikes which haven't...
03-15-21, 04:02 PM
Replies: 68
Views: 5,892
Posted By guy153

The lean is a direct function of cornering...

The lean is a direct function of cornering acceleration and is the same on any bike taking a given corner at a given speed. Otherwise it would fall over.

Most bikes have pretty standard fork...
Forum: Framebuilders
03-14-21, 02:05 AM
Replies: 12
Views: 693
Posted By guy153

I call this the British Car Problem. You hear a...

I call this the British Car Problem. You hear a funny noise and think CV joint. You take it all apart and the CV is indeed shot. Three days later, and with most of the grease now out of your eye...
Forum: Framebuilders
03-12-21, 01:04 PM
Replies: 12
Views: 693
Posted By guy153

My interpretation of what the OP was saying was...

My interpretation of what the OP was saying was that it previously had some kind of band-on brake mounts that were fitted by a 300lb gorilla.
03-12-21, 10:15 AM
Replies: 27
Views: 5,795
Posted By guy153

A solid post will resist bending better than a...

A solid post will resist bending better than a hollow one of the same diameter. Since it's a seatpost there's not much choice about the diameter.

​​​​​I've never heard of a solid seatpost. If the...
Forum: Framebuilders
03-11-21, 11:30 AM
Replies: 37
Views: 2,188
Posted By guy153

I'll watch the video :) I was thinking inline...

I'll watch the video :) I was thinking inline trike inspired by the 6-wheeler and 8-wheeler cars. So all three wheels in a line and you ride it like a regular bike. That car design is actually not as...
Forum: Framebuilders
03-11-21, 06:46 AM
Replies: 37
Views: 2,188
Posted By guy153

Actually that has got me thinking about an inline...

Actually that has got me thinking about an inline three-wheeler with rocker bogey suspension. There are still quite a few challenges with the concept however.
Forum: Framebuilders
03-11-21, 06:44 AM
Replies: 30
Views: 2,639
Posted By guy153

Well here is the final project, although I will...

Well here is the final project, although I will put some paint on it:


https://cimg1.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1587/dsc_0001_b353583abf118dcedea3c9a54f2dfc253c6db294.jpg

One...
03-10-21, 03:20 AM
Replies: 32
Views: 1,485
Posted By guy153

Didn't they put on a whole extended dropout that...

Didn't they put on a whole extended dropout that includes the brake tabs? This is a safe way to do it. The dropout curiously looked like one from Paragon Machine Works so it may be that his "mate...
03-10-21, 03:15 AM
Replies: 32
Views: 1,485
Posted By guy153

Yes. Especially as she is one of the best...

Yes. Especially as she is one of the best presenters. I saw an episode in which she painted a frame which was actually pretty good. So I apologize for calling her gormless.
Forum: Framebuilders
03-09-21, 03:25 AM
Replies: 37
Views: 2,188
Posted By guy153

It's much easier to learn to weld than it is to...

It's much easier to learn to weld than it is to make a chassis or bike frame out of PVC pipe! Especially if you aren't too bothered about weight-- you can use thicker steel (like 1.6mm) and buzz it...
03-08-21, 05:06 PM
Replies: 32
Views: 1,485
Posted By guy153

They brazed on thru-axle dropouts. Or rather his...

They brazed on thru-axle dropouts. Or rather his framebuilder "mate" did who "just happened to live round the corner". There was some earlier footage of the GCN guy apparently attacking the seatstays...
03-08-21, 03:43 AM
Replies: 32
Views: 1,485
Posted By guy153

I think that was about the time I moved to a not...

I think that was about the time I moved to a not bothering to watch GCN role. Probably well-timed. Yes Jon was good.
03-07-21, 01:54 PM
Replies: 32
Views: 1,485
Posted By guy153

I don't usually watch GCN because they're so...

I don't usually watch GCN because they're so noddy. But this has to be the peak of muppetry.

At least it wasn't a particularly nice old bike that they were ruining!


​​​
Forum: Framebuilders
03-07-21, 03:32 AM
Replies: 37
Views: 2,188
Posted By guy153

Top marks for ingenuity to those guys. But a bike...

Top marks for ingenuity to those guys. But a bike frame would be hard, especially the fork, because it has fewer tubes. You would need large diameters, two top tubes (or similar). You would need a...
03-07-21, 03:29 AM
Replies: 89
Views: 3,969
Posted By guy153

It can all change quickly based on one or two...

It can all change quickly based on one or two superstars. The US got a big boost from Lemond and Armstrong and Germany from Ullrich. In the UK we have seen a huge increase in the popularity of...
Forum: Framebuilders
03-06-21, 02:14 AM
Replies: 26
Views: 1,500
Posted By guy153

Yes steel and aluminium resist all attempts to...

Yes steel and aluminium resist all attempts to stick together when you want them to but are very good at it when you don't. The best way to attach the braze-ons might be to corrode them on :)
Forum: Framebuilders
03-05-21, 12:05 PM
Replies: 26
Views: 1,500
Posted By guy153

Yes you're right... You could use aluminium as a...

Yes you're right... You could use aluminium as a filler metal to braze the brazing rods together.
Forum: Framebuilders
03-04-21, 11:25 AM
Replies: 26
Views: 1,500
Posted By guy153

I think you can braze aluminium to steel using...

I think you can braze aluminium to steel using something something like an aluminium bronze rod.

You can even weld aluminium to steel but only by using high explosives. Probably not a good idea to...
Forum: Framebuilders
03-04-21, 08:09 AM
Replies: 26
Views: 1,500
Posted By guy153

I will be interested in the answer to your actual...

I will be interested in the answer to your actual questions too :) But why not just use steel cable housing stops? They're very easy to braze onto a steel frame.
03-03-21, 09:41 AM
Replies: 89
Views: 3,969
Posted By guy153

One possibility is they became a bit too obsessed...

One possibility is they became a bit too obsessed with cars, being pioneers of motorways, and having a lot of very strong car-manufacturing going on.
03-02-21, 12:06 PM
Replies: 89
Views: 3,969
Posted By guy153

Canyon, Focus etc are all pretty recent. ...

Canyon, Focus etc are all pretty recent.

​​​​​​If you go back 30y or so Italy had Pinarellos and Colnagos and all sorts of cool stuff, France Peugeot of course, and loads of British and Dutch...
Forum: Road Cycling
02-26-21, 05:09 PM
Replies: 109
Views: 6,636
Posted By guy153

I was surprised at how cheap the frames are. Well...

I was surprised at how cheap the frames are. Well they're not cheap, but cheaper than I was expecting.

There was a welding rod that can weld 7000 series in the news about a year ago but idk if...
Forum: Framebuilders
02-26-21, 02:32 AM
Replies: 7
Views: 798
Posted By guy153

If you use one of those it will stop them...

If you use one of those it will stop them slopping in and out but are you sure they won't still move up and down, and around, and even spin the bearings? You're relying on friction on the inside face...
02-25-21, 04:30 PM
Replies: 35
Views: 1,161
Posted By guy153

This guy's thought it through in some detail: ...

This guy's thought it through in some detail:

https://anselm.medium.com/the-case-for-mountain-biking-on-mars-98ff8350c96f
​​​​
I'm not sure that you need more traction on steep climbs. Yes...
Showing results 1 to 50 of 561
 


 
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