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Search: Posts Made By: guy153
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Forum: Framebuilders
10-27-21, 01:54 PM
Replies: 5
Views: 105
Posted By guy153

I think there's a good case for a sloping TT on a...

I think there's a good case for a sloping TT on a touring bike because you want a high stack. Surly extend the HT above the TT junction just to contrive a horizontal TT but this is putting aesthetics...
Forum: Framebuilders
10-27-21, 11:02 AM
Replies: 4
Views: 120
Posted By guy153

Car brake pipes should work pretty well. They are...

Car brake pipes should work pretty well. They are the right size. I nearly used some but my local garage only has copper ones so I just got some premade guides from Ceeway with my next order.
Forum: Framebuilders
10-23-21, 11:34 AM
Replies: 7
Views: 291
Posted By guy153

It makes a lot of sense. I can't see paint...

It makes a lot of sense. I can't see paint lasting well on a rack but could use stainless and just paint the ends of it where it's attached to the frame (which I would do with TIG silicon bronze).
Forum: Framebuilders
10-23-21, 02:32 AM
Replies: 41
Views: 6,291
Posted By guy153

That's way better than my sh0nky jig. I think I'm...

That's way better than my sh0nky jig. I think I'm going to make a new one now that I have a much better idea what I need. Out of metal of course, not aluminium. To simplify things I plan on just...
10-22-21, 03:15 AM
Replies: 44
Views: 1,050
Posted By guy153

Also surprising that there are no sockets on a...

Also surprising that there are no sockets on a rim intended for such heavy use. You do still get these-- I think it was a (fairly low cost) Rigida rim I saw them on recently. Brandt on the subject of...
10-21-21, 03:42 PM
Replies: 7
Views: 212
Posted By guy153

Yes that alignment looks pretty good. But it's...

Yes that alignment looks pretty good. But it's worth having the tool-- the hanger goes out of alignment really easily.
10-21-21, 02:01 PM
Replies: 44
Views: 1,050
Posted By guy153

If you did 7000 miles on it which I think is what...

If you did 7000 miles on it which I think is what you said then that's pretty good. Aluminium fatigues. There's no getting away from this.

Sockets help and too much spoke tension makes it worse....
10-21-21, 01:57 PM
Replies: 7
Views: 212
Posted By guy153

Is the hanger or the derailleur bent? The cage...

Is the hanger or the derailleur bent? The cage ought to be basically vertical with the bike upright.
10-21-21, 11:02 AM
Replies: 26
Views: 877
Posted By guy153

It must be very little because we use Schrader...

It must be very little because we use Schrader valves on mountain bike shocks. The pressure is about 80psi but the volume inside the shock is tiny. So if really any amount of air came out you would...
Forum: Framebuilders
10-19-21, 11:21 AM
Replies: 4
Views: 212
Posted By guy153

The slots give the paint, dried up grease,...

The slots give the paint, dried up grease, threadlock and any other junk that may be in there somewhere to go. If you just thread a plain bolt into a dirty thread it gets stuck and may well damage...
Forum: Framebuilders
10-18-21, 01:12 PM
Replies: 439
Views: 276,096
Posted By guy153

Would like to see your build but can't find the...

Would like to see your build but can't find the album! Do you have an URL for it?
Forum: Framebuilders
10-18-21, 07:13 AM
Replies: 4
Views: 212
Posted By guy153

I usually just try to stuff a bit of tissue paper...

I usually just try to stuff a bit of tissue paper in to catch most of it and then clean any paint out with acetone afterwards.

You can also make a crude thread chaser by cutting a couple of...
Forum: Framebuilders
10-17-21, 04:01 PM
Replies: 9
Views: 391
Posted By guy153

Yes little steps and most importantly don't give...

Yes little steps and most importantly don't give up. You should have seen my first TIG welds. I never thought I would be able to make a bike frame. But somehow if you keep practicing you get better...
Forum: Framebuilders
10-17-21, 03:34 PM
Replies: 6
Views: 265
Posted By guy153

Fork legs are usually pretty thick. Just drop a...

Fork legs are usually pretty thick. Just drop a bit of weld in there and sand it all flush and nobody will ever know. Very unlikely to cause a failure.
Forum: Framebuilders
10-17-21, 11:04 AM
Replies: 8
Views: 261
Posted By guy153

This makes me think it's a brazed joint. There...

This makes me think it's a brazed joint. There would be some burn through with a weld and would probably be some evidence of it even after reaming.
Forum: Framebuilders
10-17-21, 10:59 AM
Replies: 9
Views: 391
Posted By guy153

Yes, what Andrew said. In fact almost every joint...

Yes, what Andrew said. In fact almost every joint on the frame is thick to thin.

Also I would start with 90 degree joints and when you're comfortable with those try some of the angles you get on...
Forum: Framebuilders
10-16-21, 02:46 AM
Replies: 9
Views: 391
Posted By guy153

If you're making a TIG frame I would use an...

If you're making a TIG frame I would use an externally butted seat tube and a thicker head tube (32.4 rather than 31.7), and you will want a plain BB shell. Ceeway will be able to sort you out with...
Forum: Framebuilders
10-16-21, 02:30 AM
Replies: 8
Views: 261
Posted By guy153

It looks like fillet brazing but it's conceivable...

It looks like fillet brazing but it's conceivable it's a weld. Not pretty in either case. What does it look like on the inside of the tube?
10-15-21, 12:23 PM
Replies: 26
Views: 869
Posted By guy153

As others have said that's a real handmade Dutch...

As others have said that's a real handmade Dutch frame, not Chinese, and it looks very nice.

I don't think it's bad for the $$$ considering it hasn't been used. But yes make sure it's compatible...
10-15-21, 12:18 PM
Replies: 20
Views: 293
Posted By guy153

This can be the seat. Worth double checking if it...

This can be the seat. Worth double checking if it still does it if you ride standing up.
10-11-21, 10:51 AM
Replies: 12
Views: 288
Posted By guy153

You could remove it by sanding very carefully...

You could remove it by sanding very carefully with a flap disk on an angle grinder until there is just a tiny bit left and then finishing with a file by hand. Just be super careful not to touch the...
Forum: Framebuilders
10-11-21, 09:50 AM
Replies: 27
Views: 1,663
Posted By guy153

Thanks! Those flats won't do any actual harm. I...

Thanks! Those flats won't do any actual harm. I got one of these type of benders:
https://www.ebay.co.uk/itm/352850193557?hash=item522782ac95:g:XhEAAOSwWI1dyMJf
and it will probably work quite...
Forum: Framebuilders
10-11-21, 02:33 AM
Replies: 439
Views: 276,096
Posted By guy153

It would solve that issue but is a bit of a...

It would solve that issue but is a bit of a nuclear option. Really a step-through is an engineering compromise to support people who either want to ride in a dress or are used to getting on a bike...
Forum: Framebuilders
10-10-21, 02:08 PM
Replies: 439
Views: 276,096
Posted By guy153

That sounds like my wife whose bike this is :) I...

That sounds like my wife whose bike this is :) I think it's a milestone in every framebuilder's career when his own wife trusts his welds enough to let him make her a bike :)

She's now done...
Forum: Framebuilders
10-10-21, 03:32 AM
Replies: 3
Views: 194
Posted By guy153

The difference between that seat post and seat...

The difference between that seat post and seat tube is nearly 2mm, much more than 0.8. Seat tubes are always reinforced in some way at the top for the seatpost, either with some kind of a lug, or...
Forum: Framebuilders
10-10-21, 03:21 AM
Replies: 21
Views: 606
Posted By guy153

It was Columbus. I don't remember how much...

It was Columbus. I don't remember how much material I had to remove but it was pretty slow and painful. The drill battery ran out at least once :)
Forum: Framebuilders
10-09-21, 03:37 PM
Replies: 21
Views: 606
Posted By guy153

I've "reamed" HTs with emery cloth wrapped around...

I've "reamed" HTs with emery cloth wrapped around an aluminium drum with a slot in it run in a drill. A bit redneck but so long as you get a good fit without the cup spinning that's all you really...
Forum: Framebuilders
10-09-21, 02:29 AM
Replies: 27
Views: 1,663
Posted By guy153

Please post pictures when you can! Bending SS is...

Please post pictures when you can! Bending SS is something I'm still researching. It's often something that it's quite useful to have.
Forum: Foo
10-07-21, 11:00 AM
Replies: 60
Views: 1,007
Posted By guy153

Well that's better mileage than I got from my...

Well that's better mileage than I got from my 1988 RX-7 :) Yes I think PHEVs are likely to be a better way to save fuel for most of us, unless you only ever do long journeys.
Forum: Foo
10-07-21, 09:40 AM
Replies: 60
Views: 1,007
Posted By guy153

A lot of manufacturers these days use tiny...

A lot of manufacturers these days use tiny engines plus turbos to achieve artificially high mpg on benchmark tests. But in the real world once you start actually using the turbo it has to run a bit...
Forum: Framebuilders
10-03-21, 04:38 PM
Replies: 14
Views: 749
Posted By guy153

What's the reason for this? To make them more...

What's the reason for this? To make them more economical to replace, like a sacrificial component?

The problem is a fork is more safety-critical so there might/should be some temptation to...
Forum: Framebuilders
10-03-21, 04:34 PM
Replies: 21
Views: 606
Posted By guy153

Interesting, I didn't know that! A level of...

Interesting, I didn't know that! A level of perfectionism that is a bit above my capabilities :) I think with headsets so long as the steering turns and doesn't go wobbly at any point in its travel...
Forum: Framebuilders
10-03-21, 09:06 AM
Replies: 41
Views: 2,169
Posted By guy153

Even if it isn't heat-treated you're still...

Even if it isn't heat-treated you're still probably losing some cold working. If it is heat-treated though it might not be a good idea to try to bend it cold. Might be preferable to heat it.

But I...
Forum: Framebuilders
10-03-21, 02:41 AM
Replies: 21
Views: 606
Posted By guy153

I used a Columbus tapered tube. I only cut the...

I used a Columbus tapered tube. I only cut the narrower end and left the bottom as it was. I took it to a local place where they make motorbikes hoping he could face the top on a lathe (I didn't have...
Forum: Framebuilders
10-01-21, 04:07 PM
Replies: 21
Views: 606
Posted By guy153

I've used a few regular size Reynolds HTs now and...

I've used a few regular size Reynolds HTs now and they're all exactly 34mm ID. No reaming required but sometimes a bit of loctite is. Not really a fan of this but since I don't own the reamer the...
Forum: Framebuilders
09-28-21, 10:07 AM
Replies: 41
Views: 2,169
Posted By guy153

I like that bar design! Quite tempted to make...

I like that bar design! Quite tempted to make some custom bars myself.
Forum: Framebuilders
09-28-21, 02:17 AM
Replies: 41
Views: 2,169
Posted By guy153

Good idea! Have never made a whole handlebar but...

Good idea! Have never made a whole handlebar but did make, or rather convert, this stem.

The main thing with fixturing is you want your handlebar to be level. Because it's quite long any small...
Forum: Framebuilders
09-21-21, 02:03 AM
Replies: 4
Views: 685
Posted By guy153

I know someone who made one from a kit. I don't...

I know someone who made one from a kit. I don't know which kit, but it gave you a simple jig, scale drawings, everything you needed. It probably took him a couple of months. Obviously you can spend...
Forum: Framebuilders
09-18-21, 04:26 PM
Replies: 14
Views: 742
Posted By guy153

I just looked up the stack height on a...

I just looked up the stack height on a Specialized Rockhopper XXL. It's 654mm. I recently finished a bike with a stack height of 717mm (https://www.bikeforums.net/22226303-post430.html). But the...
Forum: Framebuilders
09-18-21, 03:12 AM
Replies: 14
Views: 749
Posted By guy153

If it hasn't physically changed shape it should...

If it hasn't physically changed shape it should be fine. Check for ripples on the down-tube close to the head-tube. You can get a bit of deformation there sometimes that you don't always notice, and...
09-12-21, 11:11 AM
Replies: 27
Views: 825
Posted By guy153

Maybe if your race number is a different size you...

Maybe if your race number is a different size you move the little chrome dealy out to the other boss?

Or it could be an adventure nipple ahead of its time. Modern "gravel" bikes are usually...
Forum: Framebuilders
09-12-21, 02:48 AM
Replies: 6
Views: 522
Posted By guy153

My guess is sadly not. I don't weld aluminium but...

My guess is sadly not. I don't weld aluminium but generally quality alu frames need heat-treatments. So even if you cut the TT and DT a bit shorter and rewelded the HT on I think the whole thing...
Forum: Framebuilders
09-12-21, 02:36 AM
Replies: 439
Views: 276,096
Posted By guy153

Latest build completed. As you can see some...

Latest build completed. As you can see some pretty rad yet traditional geometry on this one. The idea is high stack for commanding road position, no sore neck, hands or shoulders, plus a comfortable...
Forum: Framebuilders
09-11-21, 02:22 AM
Replies: 3
Views: 371
Posted By guy153

This gives you everything including mitre...

This gives you everything including mitre templates and runs on Linux. But might not be as graphical as you want. You have to be OK with using command line tools.
​​​​...
Forum: Framebuilders
09-11-21, 02:17 AM
Replies: 11
Views: 606
Posted By guy153

I'm not a huge fan of the really short CS on many...

I'm not a huge fan of the really short CS on many MTBs now. I actually fell over backwards on one as I was trying out trying to get out of a bombhole.

I think it's supposed to make the handling...
Forum: Framebuilders
09-10-21, 02:33 PM
Replies: 14
Views: 742
Posted By guy153

There are some online frame fit calculators where...

There are some online frame fit calculators where you measure up all your body and it spits out recommended numbers which you then ignore.

I started measuring bikes I already had and interpolating...
Forum: Framebuilders
09-10-21, 02:22 PM
Replies: 11
Views: 606
Posted By guy153

I think they may be ensteepening the STs on MTBs...

I think they may be ensteepening the STs on MTBs because they're so long at the front and often short CS. The steep ST puts the rider a bit more back in the middle.
Forum: Framebuilders
09-10-21, 03:03 AM
Replies: 11
Views: 606
Posted By guy153

It makes sense that this would be true. If you...

It makes sense that this would be true. If you have a 71 HT then the fork is being bent more as opposed to being pushed on like a pillar or column. Curved blades probably also make a difference for...
Forum: Framebuilders
09-09-21, 07:02 PM
Replies: 439
Views: 276,096
Posted By guy153

Wow this has to be the most ambitious flux core...

Wow this has to be the most ambitious flux core project of all time! I think a bike frame is one of the hardest welding projects you can do (thin-walled, round, thin to thick, safety critical) and...
Forum: Framebuilders
09-09-21, 09:05 AM
Replies: 11
Views: 578
Posted By guy153

The purpose of the repeating is just to sneak up...

The purpose of the repeating is just to sneak up on the right dimension without overshooting-- you have to relax it all in order to measure the final set. I don't think it has any effects on the...
Showing results 1 to 50 of 645
 


 
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