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Search: Posts Made By: guy153
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Forum: Framebuilders
05-25-22, 05:39 AM
Replies: 11
Views: 305
Posted By guy153

I'm not sure that kind of aluminium brazing has...

I'm not sure that kind of aluminium brazing has much strength. It really needs a TIG weld.
Forum: Framebuilders
05-16-22, 09:31 AM
Replies: 6
Views: 220
Posted By guy153

I don't know what the official size is but I...

I don't know what the official size is but I measured it to be 253.5mm for 26", and used this on a frame. The brakes fit fine. But I would also be interested to have a proper chart.
Forum: Framebuilders
05-16-22, 02:05 AM
Replies: 8
Views: 267
Posted By guy153

I did that on my (so far) one disk fork. Worked...

I did that on my (so far) one disk fork. Worked for me (TIG tacking). So many ways to screw things up with all the different standards out there it's quite nice to work with the actual caliper and...
Forum: Framebuilders
05-04-22, 01:36 AM
Replies: 6
Views: 378
Posted By guy153

Yes go for it :) When I say a bit of brass, I...

Yes go for it :) When I say a bit of brass, I mean I would use TIG silicon bronze, just as a kind of filler, after welding the crack with a steel rod. You could skip the brass though-- it isn't...
Forum: Framebuilders
05-03-22, 01:33 AM
Replies: 6
Views: 378
Posted By guy153

I would happily repair it but I'm in the UK which...

I would happily repair it but I'm in the UK which would likely be excessively expensive for shipping. It just needs a TIG weld, a bit of brass, a sliver of car body filler, some similar paint, and...
05-02-22, 06:45 AM
Replies: 66
Views: 1,871
Posted By guy153

Agree with everyone who said it was because...

Agree with everyone who said it was because frames weren't always built that well so it gave you a bit of "wiggle room". I have also seen it claimed that people used to run a fixed gear for winter...
04-25-22, 02:43 AM
Replies: 8
Views: 321
Posted By guy153

Yes I have observed this after being too lazy to...

Yes I have observed this after being too lazy to change the cassette sometimes :) You can also just not use your favourite gear. I used to use the ruler method but the chain checker is much easier...
04-24-22, 01:33 AM
Replies: 24
Views: 684
Posted By guy153

Well I stripped a bike to the bare frame...

Well I stripped a bike to the bare frame yesterday in order to repaint it and, remembering this thread, thought I would time it. It took 26 minutes, the last 11 of which were spent removing a barrel...
04-24-22, 01:30 AM
Replies: 24
Views: 684
Posted By guy153

There is a kernel of truth there. In theory a...

There is a kernel of truth there. In theory a steel frame *can* last for ever because steel has a fatigue limit (even Cromoly) and aluminium doesn't. But in practice either can fail, often due to a...
04-23-22, 12:38 PM
Replies: 3
Views: 189
Posted By guy153

Check the BB shell width. If it's 68mm you can...

Check the BB shell width. If it's 68mm you can use road cranks (or MTB cranks with spacers). But if it's 73mm you can't use road cranks.
04-23-22, 12:35 PM
Replies: 8
Views: 321
Posted By guy153

There is a way to measure wear on the cassette by...

There is a way to measure wear on the cassette by measuring distance between teeth, if you know what it's supposed to be. There's an extremely technical YouTube channel about this.

But I just...
Forum: Framebuilders
04-16-22, 02:31 AM
Replies: 14
Views: 595
Posted By guy153

What if it's getting in through the hole everyone...

What if it's getting in through the hole everyone puts in the BB shell, and into the other tubes from there? Ofc on lugged frames there wasn't much option (unless you went around putting corks...
Forum: Framebuilders
04-15-22, 09:54 AM
Replies: 14
Views: 595
Posted By guy153

The problem it seems to me with a hole in the BB...

The problem it seems to me with a hole in the BB shell at the bottom of the ST is that it will never be big enough-- water can surely still collect around the hole, just behind the welds. Make it any...
Forum: Framebuilders
04-15-22, 01:58 AM
Replies: 14
Views: 595
Posted By guy153

Why did they put corks in seat tubes? Was it...

Why did they put corks in seat tubes? Was it supposed to prevent rust? Or just to protect/destroy the habitat of the Portuguese cork lynx?
Forum: Framebuilders
04-12-22, 01:27 AM
Replies: 13
Views: 647
Posted By guy153

Reynolds make some double-butted Ti, but it's...

Reynolds make some double-butted Ti, but it's very expensive and high-zoot stuff:

https://www.reynoldstechnology.biz/materials/titanium/t-3-2point5ti/

I think most people use plain gauge. I saw...
Forum: Framebuilders
04-11-22, 11:43 AM
Replies: 13
Views: 647
Posted By guy153

Although specialized trials bikes are very...

Although specialized trials bikes are very bizarre (hydraulic rim brakes, rims roughened with an angle grinder, the freewheel at the bottom bracket) people with enough skill can do a lot of tricks on...
Forum: Framebuilders
04-11-22, 01:22 AM
Replies: 13
Views: 647
Posted By guy153

Interesting! Trials frames are seriously weird...

Interesting! Trials frames are seriously weird from the point of view of basically every other kind of frame. If you've ridden frames with a similar drop and wheel size then it should be all right....
Forum: Framebuilders
04-10-22, 09:02 PM
Replies: 13
Views: 647
Posted By guy153

First thought is that 700c wheels with only a...

First thought is that 700c wheels with only a 15mm BB drop may put the BB unnecessarily high. You may be basing that drop off the Alfonso but if that's a trials type of bike it may have much smaller...
04-09-22, 12:33 AM
Replies: 22
Views: 526
Posted By guy153

Thanks for the explanation! This explains a lot....

Thanks for the explanation! This explains a lot. I have been curious about this fork for some time and should have started my own thread about it.

Yes a brilliant design and I like the look....
Forum: Framebuilders
04-09-22, 12:21 AM
Replies: 32
Views: 833
Posted By guy153

The two are related in this case because lack of...

The two are related in this case because lack of stiffness can cause the structure to deform meaning it's loaded differently and therefore breaks. Basically if it bends it might break (in the case of...
04-08-22, 01:59 PM
Replies: 24
Views: 684
Posted By guy153

Close to ideal. Of course not perfect but so much...

Close to ideal. Of course not perfect but so much more common than touring bikes it's much easier for someone on a budget to find one. TBH I don't think geometry really makes that much difference...
Forum: Road Cycling
04-08-22, 12:05 PM
Replies: 198
Views: 9,812
Posted By guy153

I hadn't even heard of these. When you say...

I hadn't even heard of these. When you say cheaper to make does this mainly apply to carbon fibre rims? The aluminium ones you just scooch out of your extrudifier surely and it should all be...
04-08-22, 09:21 AM
Replies: 24
Views: 684
Posted By guy153

You might be making a touring bike with a classic...

You might be making a touring bike with a classic 90s MTB frame. Actually a likely project as those frames are ubiquitous and close to ideal for touring.
Forum: Framebuilders
04-08-22, 08:02 AM
Replies: 32
Views: 833
Posted By guy153

Good luck! You could glue a bit of aluminium...

Good luck! You could glue a bit of aluminium plate on top where the bolts need to go and then just drill through the whole lot.

When I made a hybrid CF frame with tubes glued into metal lugs the...
04-08-22, 01:09 AM
Replies: 24
Views: 684
Posted By guy153

OK that would have only added about 30s to the...

OK that would have only added about 30s to the build time then :) The problem is you have a road crankset that needs a 68. I don't think there's any way to fit that to a 73.
04-07-22, 10:25 AM
Replies: 22
Views: 526
Posted By guy153

I think mine might be more of a touring bike, and...

I think mine might be more of a touring bike, and it might be even older than the 1970s. It's 531 so though pretty nice.

Here are the numbers:

Head angle: 73.5 degrees
Seat angle: 71 degrees...
04-07-22, 09:32 AM
Replies: 22
Views: 526
Posted By guy153

I actually have an old Raleigh frame because...

I actually have an old Raleigh frame because reasons. Don't know if it's a "Pro" but I'll go and have a look and take some measurements.
04-07-22, 09:28 AM
Replies: 24
Views: 684
Posted By guy153

So what did you do about the BB shell? You'd...

So what did you do about the BB shell? You'd didn't take 2.5mm off each side with the facing tool?

I once built a bike with a new frame (I had made) and all new parts (in boxes) in one go because...
04-07-22, 01:34 AM
Replies: 24
Views: 684
Posted By guy153

Depends how many curveballs you run into along...

Depends how many curveballs you run into along the way: unanticipated incompatibilities between parts, things that are stuck or turn out to be knackered. You might need to mess around fabricobbling...
Forum: Framebuilders
04-07-22, 12:46 AM
Replies: 8
Views: 679
Posted By guy153

The part I don't understand is that in my...

The part I don't understand is that in my experience, with 6 TIG frames in a row now, is that if my jigging is right to start with then things hardly move during welding. Certainly nothing like that...
Forum: Framebuilders
04-06-22, 11:48 AM
Replies: 32
Views: 833
Posted By guy153

I think you need to use tubing (or something...

I think you need to use tubing (or something similar). With the forks longer than 6" as they will be they will bend quite easily if you get your foot sideways or something, especially if made of...
Forum: Framebuilders
04-06-22, 09:12 AM
Replies: 8
Views: 679
Posted By guy153

Update to this. I just measured the alignment....

Update to this. I just measured the alignment. The string goes from the dropouts around the HT in the usual way. The gap from ST to string is 4.5mm larger on one side than the other! These calipers...
Forum: Framebuilders
04-06-22, 08:08 AM
Replies: 32
Views: 833
Posted By guy153

Yes agree bolts are not good with carbon fibre....

Yes agree bolts are not good with carbon fibre. Most CF frames and forks I've seen also have glued in bits of aluminium for dropouts etc.

But it's easy to glue either with epoxy or MMA glue so...
04-06-22, 05:31 AM
Replies: 9
Views: 473
Posted By guy153

An update to this. I've installed the shifter but...

An update to this. I've installed the shifter but with the cable a little bit slacker so that the big ring corresponds to it sticking basically straight out. In that position the cable has much less...
Forum: Framebuilders
04-05-22, 03:43 PM
Replies: 32
Views: 833
Posted By guy153

I do basically everything with a grinder. I know...

I do basically everything with a grinder. I know we're supposed to have a collection of files and hand-tools and things but really, for me, I can just do everything better with a grinder using mainly...
Forum: Framebuilders
04-05-22, 01:54 PM
Replies: 32
Views: 833
Posted By guy153

Interesting project! It will probably be strong...

Interesting project! It will probably be strong enough in theory but a tube or a box section is a more optimal shape. You might not have enough stiffness. If the fork bends in use then it's loaded in...
Forum: Road Cycling
04-05-22, 08:58 AM
Replies: 38
Views: 1,763
Posted By guy153

XCR is 0.6/0.4/0.6, which is the same as Spirit....

XCR is 0.6/0.4/0.6, which is the same as Spirit. I don't see any Spirit that's thinner. But you can get Reynolds 953 a bit thinner (0.5/0.3/0.5). In the case of 953, it's a bit thinner than 853 "Pro...
Forum: Road Cycling
04-05-22, 04:30 AM
Replies: 38
Views: 1,763
Posted By guy153

The actual tubes are about 3 or 4x the price. But...

The actual tubes are about 3 or 4x the price. But framebuilders often charge proportionally much more for higher-end tubes than they actually cost. In this case it would be justified though as those...
Forum: Road Cycling
04-04-22, 02:38 PM
Replies: 38
Views: 1,763
Posted By guy153

Sorry DT/BB rusting, I thought you said ST/BB. I...

Sorry DT/BB rusting, I thought you said ST/BB. I guess water could be getting in through the bottle cage holes or even finding its way down the DT from the HT (that junction is also vented). But hard...
Forum: Road Cycling
04-04-22, 10:54 AM
Replies: 38
Views: 1,763
Posted By guy153

The hole in the BB shell below the ST may not be...

The hole in the BB shell below the ST may not be big enough so water can pool around it. Do you have fenders? Rain can spray up behind the seat and just drop into the seatpost. Depending on the...
Forum: Road Cycling
04-04-22, 09:50 AM
Replies: 38
Views: 1,763
Posted By guy153

Are they rusting from the inside? If water got...

Are they rusting from the inside? If water got down the seat tube it could be collecting at the bottom.
04-04-22, 09:43 AM
Replies: 18
Views: 744
Posted By guy153

I like LX hubs too. I think they have laybrinth...

I like LX hubs too. I think they have laybrinth seals "now" (actually for years).
04-04-22, 01:42 AM
Replies: 47
Views: 1,519
Posted By guy153

I guess another option is just go to the...

I guess another option is just go to the Netherlands and buy one there. That way you can try them out and make sure you get one the right size that feels good.

This was my take on a modern "rad...
Forum: Framebuilders
04-03-22, 12:51 AM
Replies: 11
Views: 573
Posted By guy153

I don't think so. But you could probably braze it...

I don't think so. But you could probably braze it with that kind of torch. Is it basically a bent piece of thick wire that you need to join together and also attach to a mounting plate?
04-03-22, 12:43 AM
Replies: 47
Views: 1,519
Posted By guy153

Yes, and Dutch people are enormous. So it was...

Yes, and Dutch people are enormous. So it was definitely the closest match. But I agree that 330lb is probably too much weight for an omafiets. An opafiets with double-oversize tubing and two top...
04-02-22, 11:55 AM
Replies: 47
Views: 1,519
Posted By guy153

Yes agree. He should talk to a custom...

Yes agree. He should talk to a custom framebuilder. He's tall, heavy, and wants what is (bizarrely) these days an unusual riding position. It would be a fun project for a custom builder.
Forum: Framebuilders
03-30-22, 12:47 AM
Replies: 41
Views: 1,476
Posted By guy153

Interesting aside and sorry to bring the modern...

Interesting aside and sorry to bring the modern world into this but I think this does happen now with carbon fibre frames and forks. There are companies in China who will sell you standard frames and...
03-29-22, 09:23 AM
Replies: 17
Views: 550
Posted By guy153

Yes that's the stuff. That one with 36E on the...

Yes that's the stuff. That one with 36E on the can is "satin". You want the 88E for full lush glossiness. It's quite pricey but works. One thing to watch out for is give it at least 48h before...
03-29-22, 03:01 AM
Replies: 17
Views: 550
Posted By guy153

I use it outdoors and with a respirator. Yes it's...

I use it outdoors and with a respirator. Yes it's pretty good. I was doing some tests the other day on some tubing I had with it on (long story, I was modifying a frame to add more standover height,...
03-28-22, 09:25 AM
Replies: 22
Views: 537
Posted By guy153

To me internal brazing is the defining feature of...

To me internal brazing is the defining feature of Peugeots. Everyone had those silky white ones back when I were a lad which were usually made of various proprietary steel alloys a bit below where...
Showing results 1 to 50 of 783
 


 
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