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Questions tagged [steel]

For questions about the metal used to build some bike frames; use for questions about its properties or care of parts made from it.

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Advice on getting a used Schwin Super LeTour (or comparable)

TLDR: Please advice me on getting a used Super LeTour. [Caveat (for moderators): This is not a shopping thread, looking for specific offers. This is a "how to" get an old bike question......
guest troll's user avatar
3 votes
2 answers
124 views

Help identify early 90s Chro-Moly MTB

I have this Chro-Moly bike I bought in the early 90s in Chile branded as Oxford, but I believe the frame is an import. One mechanic said it is japanese, another that it's italian. The rear part of ...
mantruc's user avatar
  • 31
1 vote
2 answers
115 views

What would be the best steel to pick for bolts fastening a luggage carrier (rack)?

I'm installing a rack for a new project. The rack model I'm picking is rated for a load of 18 kg, and there are even models rated up to 27 kg! Though, racks are usually fastened to the bike using just ...
Gras Double's user avatar
3 votes
1 answer
75 views

Bent Marin team issue steel derailleur hanger. Can I salvage this incredible frame? What's next step?

I found a marin team issue on a local marketplace. The frame is in good shape it seems and I have many m900 parts from the time so I'd love to re-build completely. The main issue so far is the ...
tweedi's user avatar
  • 587
5 votes
2 answers
143 views

Small rust holes on bottom side of top tube: is this steel frame salvageable?

I was planning on getting this old steel frame powder coated, but the guy doing the powder coating noticed some small holes in the top tube after he stripped it. Does this indicate the top tube is ...
Gordon's user avatar
  • 51
2 votes
0 answers
102 views

I used acid to clean rust from parts on resto project. Should I worry about hydrogen embrittlement?

I have a 1970s U-folder type bike which was very crusty when I acquired it. I removed the rust by soaking the parts in lemon juice for between 24-72 hours, depending on the part. Something I wasn't ...
Lykoloo's user avatar
  • 21
4 votes
1 answer
128 views

Butted tubing - lighter but is it more fragile (child seat)

Looking to build a daily on a steel frame, tempted to go for a higher end (Marin, Kona, some Raleigh) but I am wondering if the double or triple butted tubes are more fragile ? For example if you put ...
tweedi's user avatar
  • 587
2 votes
1 answer
100 views

Bent Reynolds 531 Simplex stays at dropouts

I have just bought a Reynolds 531 Simplex bike frame and noticed the left chainstay and right seatstay look slightly bent at the dropouts. The right dropout appears to be incompletely inserted into ...
Ted Burgess's user avatar
4 votes
3 answers
457 views

Gap between fork and dropout

I’ve just bought a secondhand bike (with an ~80’s Dawes steel frame) and on checking it over I noticed there’s a gap on one side of the forks, where it meets the dropout. The top side and bottom of ...
sp4rky-boi's user avatar
7 votes
13 answers
2k views

Aluminum seatpost broken into a steel frame

Similar to Aluminum seatpost stuck to a steel frame but worse, since the seatpost is broken exactly at the end of the seat tube. Image below. Below is a suggested fix using a quill stem as a "...
pippo1980's user avatar
  • 203
1 vote
1 answer
151 views

How thick is a traditional steel road bike lug?

I want to create some bike lugs for my specific geometry using 316L and 3D printing. What is the thickness of traditional steel lugs? Are there any other suggestions on this build?
Zyleyus's user avatar
  • 191
2 votes
5 answers
2k views

How do vintage steel frames compare to modern ones?

I got myself a nice vintage Koga Miyata road-speed from 1978 and am planning to converting most parts of it while keeping the frameset intact. The bike rides really nice and have no issues but it got ...
Luca Matteis's user avatar
  • 1,015
2 votes
2 answers
233 views

Welding a centre kickstand plate to 4130 steel frame?

Hopefully a simple question (?!). I'm wondering if you could help me with a simple answer. I have a 30 year old UNIVEGA tandem frame that my family and I love to ride. The problem is, with a baby-seat ...
Jason's user avatar
  • 21
6 votes
1 answer
118 views

Is it strong enough to braze stainless steel tubings with silver?

I was told that you could not braze stainless steel tubing with brass as you would with non-stainless ones. And you should use 56% silver instead? Isn't silver too weak to braze tubes together? I know ...
Zyleyus's user avatar
  • 191
3 votes
2 answers
2k views

What type of bikes have a steel frame with 135mm rear dropouts spacing?

I'm looking for a bike frame made of steel with a 135mm rear dropouts spacing. The reason is that I might have to cold set at ~ 138mm for a project. It could be a road bike, a mountain bike, or a ...
tweedi's user avatar
  • 587
2 votes
2 answers
1k views

Most durable bicycle frame: Titanium?

My Kuota carbon frame of 10 years is trashed. It was ridden for 100 000km in the most abhorrent weather conditions and never cleaned. It makes cracking sounds when under torsional loads, the steering ...
AzulShiva's user avatar
  • 1,468
5 votes
4 answers
653 views

How to replace a broken front hub on a vintage steel wheel from a vintage steel bike?

My mother's old bike is being used as a 'spare bike' for various of the kids. It's from the '70s, a steel framed, steel wheeled, dynamo lit, sit up and beg granny bike with a sturmey archer three ...
HSH's user avatar
  • 95
0 votes
5 answers
2k views

Aluminum or steel for my first mountain bike?

For the past few months I've been planning to buy my first mountain bike. I'm struggling with buying an aluminum bike or a steel one. I recently read that aluminum bikes are as heavy as steel bikes: ...
Zahraa's user avatar
  • 9
0 votes
1 answer
213 views

Lugged steel frame ID

Can't find any sort of serial number stamped anywhere. I am going to strip it down and rebuild it. the downtube shifter cable clamps have 333 on them. Link to the imgur gallery
Skellie Hyrule's user avatar
2 votes
2 answers
283 views

Vertical mark on chainstay?

I bought a used 1990's steel bike the other day and have disassembled it for repainting. However I came across a small patch of missing paint on the drive-side chainstay, which had apparently been ...
Morgan087's user avatar
4 votes
2 answers
1k views

Slightly bent seat stays. Should I worry about it?

I just realized my seat stays are slightly bent The frame is steel. Is this something I should be worried about? PS: notice how also the top of the seat stay is naturally bent. Perhaps a normal design ...
Luca Matteis's user avatar
  • 1,015
1 vote
1 answer
171 views

Unknown brazed steel frame

Hi all new here after a lot of searching, i was hoping maybe someone would be able to help me. Ive been trying to find out what frame i have. I bought a old steel frame from a car boot sale about 10 ...
Ady's user avatar
  • 11
1 vote
1 answer
117 views

How do you tell what model of bike I have? [duplicate]

I bought this bike 2 days ago. I searched for some info, but couldn't find it. The only information I found was to be around 1972
Hrista's user avatar
  • 11
2 votes
3 answers
2k views

Fixed gear steel frame from AliExpress

I would like to build my own fixed gear bike. I want a steel frame, I know different quality of steel and I want to avoid HI-Ten. I will be mostly for urban cycling (pavements) and I would take ...
Smilia's user avatar
  • 243
0 votes
1 answer
155 views

Gravel bike frame material: carbon, aluminum, titaniul or steel? [closed]

For a long ride on a gravel bike, what is the best frame material?
Fart_in_the_air's user avatar
1 vote
1 answer
453 views

Cito bicycle history / old steel bike identification

I have a Cito Master Star bicycle but cannot find any info about it online. I think it is a 1969 model as it has a 69 stamped onto it. It also has aero coronado cranks but has some belt drive system I'...
Thomas's user avatar
  • 13
4 votes
3 answers
2k views

My chainstays have been eaten by rust, can something be done?

I hope you are all safe and sound and your Christmas time is at least decent in these pandemic times. The other day I decided to give a good clean to my steel city bicycle and I removed the stand, ...
EarlGrey's user avatar
  • 3,700
6 votes
4 answers
910 views

Will grooves on seatpost cause rusting inside frame?

My bike has grooves in the seatpost as shown in the picture. The grooves do stop slightly further down the post, but the best saddle height for me is when the grooves partially go down into the seat ...
thosphor's user avatar
  • 510
4 votes
1 answer
597 views

132.5mm dropout spacing with a 130mm hub AFTER it has already been used with a 135mm hub

I have a steel frame with 132.5 mm dropout spacing, the manufacturer claims it is compatible with 130mm or 135mm hubs...but I wonder if it will remain compatible with 130mm hubs AFTER it has been run ...
mancini0's user avatar
  • 163
2 votes
1 answer
1k views

Can I use an expanding plug rather than a star fangled nut in a steel steerer?

I've got a Genesis Equilibrium 725 steel frame and fork that came with an unbranded (but said to be Prestine) headset and Genesis-branded top cap and star fangled nut. The headset and nut aren't ...
user7761803's user avatar
12 votes
7 answers
3k views

What are the most basic parts of a bicycle which cannot be upgraded over a period of time?

After reading this question: Cheap MTB with future upgrades v/s costly fully ready MTB, I myself had a question. What are the most fundamental parts of a bicycle? What are the things which we have to ...
kartlad's user avatar
  • 393
10 votes
3 answers
2k views

What's the strongest way to bond a cable stop to an steel frame?

I have a steel single speed bike and want to add a rear brake. All is good expect there is no cable stops on the top tube. I want to bond two cable stops to the under side of the top tube.
user52112's user avatar
  • 101
3 votes
3 answers
543 views

Are there any good reasons not to remove cantilever brake bosses in order to fit calliper brakes?

I have a steel bike, with cantilever brakes. I much prefer calliper brakes. I'm planning to get the frame resprayed. Maybe this isn't such a great idea, but I'm wondering about having the cantilever ...
Daniele Procida's user avatar
3 votes
1 answer
1k views

Can I shrink my steel rear dropouts to fit a smaller hub?

I am rebuilding a 1971 Raleigh International road frame into a single speed bike for college. I bought a set of track wheels with rear hub spacing 110mm. The rear dropout on the Raleigh is 120mm. Will ...
James Rockey's user avatar
3 votes
3 answers
909 views

How to measure and treat BSA bottom bracket housing misalignment?

I own an old Raleigh steel frame ('89) and wanted to install a cartridge bottom bracket (Shimano UN55). I noticed it was difficult to fit it in the housing. When installed, the square taper shaft ...
user430's user avatar
  • 733
10 votes
1 answer
4k views

How does brazing and welding not ruin the heat treat on steel tubes?

How does brazing and welding not ruin the heat treat on steel tubes? With such high temperatures, wouldn't the heat treat be ruined? Edit: Specifically in this video ...
justin's user avatar
  • 379
1 vote
3 answers
1k views

Is this level of rusting removable by sandblasting?

Is this rusted steel frame still salvageable? The local bicycle shop does sandblasting before they powdercoat a frame. Do you think the sandblasting alone would be enough to remove the rust? I'm ...
brabec's user avatar
  • 230
1 vote
4 answers
1k views

badass-stuck seatpost [duplicate]

I've recently found a nice bike with a steel frame. Well I noticed the aluminium seatpost was stuck but had no idea how heavily. To be honest I never had a similar problem and underestimated that ...
madn's user avatar
  • 19
3 votes
4 answers
6k views

Should I buy this bike with a dent in the top tube? Is it safe?

I'm considering buying this used steel-frame bike. But the top tube has a small dent (about one-third of the way from the saddle). Is this a problem? I plan to use it daily (~6-7mi) for commuting to ...
SidtheKid's user avatar
3 votes
2 answers
702 views

How much flexibility is normal for steel frames?

I have an 1980ies steel road bike which I used to ride clipless pedals on. I have recently switched to platform pedals for commuting and found out that when I'm coasting and move my feet left and ...
Equi's user avatar
  • 175
2 votes
2 answers
3k views

Titanium seatpost in steel seat tube, good idea?

I want to use a titanium seatpost in a frame with a steel seat tube (Columbus Spirit tubes). Is it a good solution? I want to understand if the metals play well from a structural point of view, and I ...
Alessandro Cosentino's user avatar
3 votes
3 answers
2k views

Welding steerer tubes

I've cut my bike's steel steerer tube too short. The bike has a fully integrated headset. I've asked both a neighbour who's an ex Specialized concept (Certini) mechanic now with his own shop (...
Steven Doyle 's user avatar
1 vote
1 answer
1k views

How to treat rust spots on a steel frame without stripping the paint completely?

I have a 1974 steel French road frame and most of the original paint is still intact. However, there’re quite many 1-2 cm surface rust spots. I also recently had one of the lugs partly re-brazed and ...
Dmitry Semichev's user avatar
4 votes
3 answers
2k views

Is this crack on my seat stay mechanically safe?

Recently picked up a steel frame and realised there was a crack on one side of the rear triangle, right by the seatpost. Crack seem to be contained towards the outer part of the tube so does not seem ...
D Lucky's user avatar
  • 43
1 vote
1 answer
680 views

Are dimpled chainstays weaker than smooth ones, other things equal?

Here are two frames: Velo Orange Campeur and New Albion Drake. Assume that they are made of essentially the same steel, 4130 CrMo. The Drake has a very pronounced dimple on the inside, to help ...
Gabi's user avatar
  • 139
4 votes
1 answer
2k views

How to / is it possible to straighten a bent seatstay/chainstay on a steel frame? At home or inexpensively by a professional

I have a Genesis Croix de Fer 20 (725 Chromoly) and crashed with my friend on his bike. On one side the back of the frame bent out so the wheel drops out, it is bent but not crumpled. I would like ...
Hugo Russell's user avatar
1 vote
4 answers
321 views

Can this frame be used or is it done?

I have a cheap mens Huffy mountain bike which I noticed has 2 holes in the frame. Would this be too unsafe to ride?
Anas's user avatar
  • 247
7 votes
2 answers
759 views

What is the function of these 'bulges' on the frame?

A friend brought me an old frame that he found on the roadside on bulky waste day (is that a thing outside of Austria and Germany?). The rear wheel was gone, the front one bent beyond repair, but the ...
Donat Holzer's user avatar
7 votes
3 answers
916 views

Would like to identify a late 80s/early 90s lo-pro bicycle's manufacturer and tube type

I just purchased this bike locally in Southern California and thought it would be straightforward to identify but I've asked around and no one seems to know. The specs are: Lugged steel (fork crown ...
M. Hernandez's user avatar
1 vote
0 answers
237 views

Identifying a brazed steel frame

I'm trying to identify this brazed steel frame I came across. Any help would be greatly appreciated.
Flewthecoupe's user avatar