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Bicycle frame construction, selection, maintenance, and repair.

1
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1answer
62 views

Are bike frames galvanized

I'm sorry for the stupid question, but I have a primer that works on steel but specifically says to avoid galvanized metals. I don't really know how to tell if a metal is galvanized or what use-cases ...
0
votes
0answers
70 views

What is the name of this frame?

Is this a real head badge? And if so whats the name?
-2
votes
0answers
34 views

Can anyone help ID this bmx frame

Ok so found this frame laying around seems pretty cool its very light weight but one friend said he thought it was worth alot im not sure have no clue on this stuff here are some pics
0
votes
0answers
52 views

Help identifying this frame

I need help identifying the brand and year of this frame. The serial number is hdh701052. I was thinking it is a San Andreas, but the frame lacks the bolt holes for the seat stay.
6
votes
3answers
140 views

The Effects of Widening Seat/Chainstays

first time so bear with me please. I recently had to replace my rear wheel. Went to LBS and the only options available are 130mm spaced. I have a nice Specialized 1980s frame that measures 126mm. It's ...
0
votes
1answer
73 views

How can I fit this bottle holder to this bike?

I want to fit this bottle holder on my bike but the attachment seems too thin for the frame tubes. I believe this is a universal bottle holder and my bike isn’t of unusual size or tube girth. Am I ...
4
votes
1answer
130 views

Are these extra holes on the frame for disc brakes?

My mtb (SERIOUS Rockville), which currently has rim brakes, has these holes at the back of the frame and I am trying to understand their use. Are these for disc brakes? Are these for disc brake ...
1
vote
2answers
74 views

Are bicycle serial numbers no longer stamped into the frame?

I found this bike ad which detailed the serial number of the bicycle for sale. I was surprised to see its simply a sticker which is far from the indelible stamped digits and letters on frames I'd seen ...
2
votes
1answer
62 views

Installing modern Deraileurs in an Old type mountain bike Frame

Found my old mountainbike(steelframe) and i saw that its Rear Deraileur was worn out, was wondering would i be able to install a modern deraileur on a bike frame like this? I'd also like to ask if ...
2
votes
0answers
54 views

How to evaluate different alloy types used for bicycle frames?

Only certain alloys are used for bicycle frames besides other materials like carbon fibres (at least for the mass market). I often stumble over aluminium alloy 6061 and 7005 (and I think I saw 8004 ...
2
votes
2answers
123 views

Is it possible to fit a 36T chainring on a 34T frame?

I'm thinking of building a bike from scratch around a Commencal HT AM 2018 frame, which normally comes with a 32T front chainring (1x setup) and says it takes 34T max. However a 36T would be ideal for ...
0
votes
0answers
56 views

Help to identify raw prorotype frame

The frame is aluminum and looks bulky but only weights 1/2 a pound there are no stamps no stickers and no numbers anywhere on frame I was told it could be a prototype
1
vote
2answers
117 views

I am 1.7 m tall and bought a MTB with a frame that is 3-5 cm too big

The frame is 5 cm too big for me (in the length from seat to handles). I have major discomfort in my shoulders. After getting a shorter stem, the shoulders are 95% improved, but the "jewels" go dead ...
1
vote
2answers
59 views

Bike measurements vs my measurements

I would like to buy a used Rose Pro DX Cross bike (model 2014 or 2015) and its size is listed as being ST-56 cm and TT - 54 cm. I'm 178 cm in height and my inseam length is 79 cm. Do you think it's ...
4
votes
2answers
172 views

Titanium frame crack

I have a one inch crack in the topside centre of my top tube in my Ti bike. Is this a problem in terms of frame integrity or? Is it fixable? The bike was hand built by a local well known frame builder,...
1
vote
1answer
46 views

What tool do I need to press fit a “Spanish” bottom bracket?

I bought a BMX style bottom bracket called a "Spanish" bottom bracket for a dirt jumper. Instead of using a hammer and a block of wood, I would like to do it correctly with a press... however, I'm ...
7
votes
1answer
1k views

Bike comes with frame integrated bolt seatpost clamp - can I cut it off and use QR?

I've got a Marin Pine Mountain 1 2016 - it comes with a frame integrated bolt seatpost clamp. Is it possible to cut this off and use a QR seatpost clamp instead? Bike : Seat Clamp :
1
vote
2answers
37 views

What size frame is right for me? [closed]

I have an inseam of around 26 1/2 inches (without shoes). Would a 47cm frame fit me? If not what would the correct frame size be? I'm looking for a hybrid (or road) bike.
2
votes
1answer
102 views

Good fit vs. Best fit - Lower end of the fit range (Difference of 1 cm). Is it OK? or can this tiny difference still cause pains?

I want to buy a second hand Trek Cronus (Gary Fischer Collection) bike (50cms) for my wife. I am getting a good deal on it. My wife's height is 156cms. As per the Trek Sizing chart, the range of rider ...
4
votes
3answers
87 views

Should I leave bolts in frame when I've removed component (mudguards for example)

I've just remove my mudguards from my Ti frame and as usual I have put the bolts back into the frame where the thread goes into a tube - for example in the chain-stay bridge and brake bridge. I used ...
3
votes
1answer
101 views

Should I put a downtube guard on my aluminium enduro bike?

I am about to purchase a new Whyte G170s mountain bike. It does not come with a downtube protector to protect from rock strikes. Although the frame is not carbon I am wondering whether I should buy a ...
2
votes
1answer
58 views

What do these headset specs mean?

I'm building this frame from the ground up: https://www.deitycomponents.com/cryptkeeper_frame.html The specs for the headset say: IS 52/40 Lower Bearing (Tapered Steerer) IS 52/30 Lower Bearing (...
1
vote
1answer
108 views

Specialized frame warranty - cracked Alu seat tube

I have a Specialized Allez Sport 2012. Which I purchased, new, just under 6 years ago in the UK. The aluminium frame has developed a crack in the seat tube, just above the brazed on derailleur mount. ...
2
votes
1answer
156 views

Is this a real Concorde or just a replica?

I'm confused with this, the lugs in this bike look identical with another Concorde but the tubing sticker clearly says "Reynolds". (Concorde only uses Colombus, right?)
2
votes
0answers
71 views

Can you help identify this road bike frame manufacturer?

I searched the internet but found nothing
4
votes
1answer
281 views

Tires for cyclocross bike

I have cyclocross bike with alu frame (Focus Mares). It is currently running on Continental Cross tires which are around 400g. I mostly ride it in city and sometimes go for weekend tours in ...
5
votes
1answer
175 views

How serious is the dent on alu frame?

I have crashed on my cyclocross bike and got a dent on it's alu frame. I don't see cracks. How serious is this dent? Can it lead frame to suddenly fail?
0
votes
0answers
34 views

Monstercross gravel bike: Will a Salsa Warbird frame fit 45mm Riddlers on wide 28mm rims?

Will 45mm WTB riddlers on wide 28mm internal width rims fit between the rear chainstays of the Salsa Warbird? I'm building a set of monstercross wheels for my Salsa Warbird, but before purchasing the ...
2
votes
1answer
66 views

Measure seatpost diameter on frame / Raleigh granada 1986

Yesterday I saved a Raleigh granada frameset from 1986. It's in ok condition but without any of the original parts. The plan is to build it up with leftover parts. So no original restauration on this ...
0
votes
2answers
117 views

Did I damage my frame by removing a sticker?

I’ve just bought a new bike with a matt finish, and peeled off a sticker from the top of the frame - but this revealed a shiny finish underneath. Is this a problem, and do I need to do anything ...
3
votes
2answers
39 views

Surly Trucker Disc Compatibility with Ryde Taurus Rims

Is it possible to put these Rims (Ryde Taurus 21 Disc: 26', 21-559) on this frame (Surly Trucker Disc)? I just cannot find any hint at the Surly Trucker description, but since I am not a native and ...
2
votes
1answer
262 views

Part name: what is this attachment point for on my new Cube carbon frame?

I've got a new fully today, and there is one attachment point on the frame that I cannot identify. Perhaps it's a silly question, but I've given up after 20 minutes of googling :)
0
votes
1answer
76 views

Drill into steel frame for cargo rack

So I have a bike without pegs for the mounting of a cargo bike rack. It is a steel frame so I was thinking of installing make-shift pegs myself. Is this going to breach the integrity of the frame? ...
0
votes
0answers
83 views

does anybody recognize this mtb frame?

I just got this frame for a few bucks and I wonder if it is from a known manufacturer or not. I often find bikes with similar design aspects, but not this frame. There was also a Marzocchi 55 ETA from ...
0
votes
2answers
151 views

What's that frame ? I can't find anything about it anywhere

I've got no idea what frame that is, or when it's been made. If anybody knows anything about it please let me know
7
votes
3answers
1k views

Bike with a hi-ten steel frame for getting around the city?

Recently I bought a new bike which has the following characteristics: Size of frames: M (44cm) / L (48cm) / XL (52cm) Wheel size / Number of gears: 26 "/ 21 Frame: HI-TEN Steel Fork: HI-TEN steel ...
1
vote
4answers
78 views

Protect chipping frame from metal bike lock with Sugru

What's the best method to stop a Kryptonite Mini d-lock scratching/chipping an aluminium frame? Stickers have already been applied as a first layer of protection. Is there something similar to the ...
-3
votes
2answers
162 views

Can anyone tell me what I've inherited here?

This is classic for my town. I'm trading this bike for a 4 Runner and would see if its even up to par. I'm not one to hit and run, as I'm usually the one getting hit, but maybe this guy is better than ...
-1
votes
2answers
77 views

How can I learn to recognize good geometry on a bike frame?

If I look at the frame, and I see a nice "beaded" weld, how can I know if the rest is "bad"? Is there a way to tell from the geometry of the frame somehow? How can you tell by looking or with a ...
1
vote
2answers
122 views

Scott Aspect 700/900 frames

Do I understand correctly that Scott Aspect 700/900 series use the same frame and the difference between the 910 and 960 are in other components? https://www.scott-sports.com/global/en/product/scott-...
2
votes
2answers
135 views

Can this damage to my brake mounts be repaired?

So, I tried to take some brakes off of a bicycle to change my old-style callipers with V-brakes; the results were not good. One of the "heads" or "lugs" was so caught in brake itself that I managed ...
4
votes
1answer
532 views

What to do about damaged bike frame

I recently bought a used bike from a police auction that had a nasty cut in the frame (presumably caused by a angle grinder or something similar). Should I be worried about the bike's structural ...
6
votes
1answer
133 views
6
votes
4answers
3k views

Is it worth buying carbon fiber road bike for short commutes?

I'm planning to use a bike for rather short commutes (max half an hour), will the carbon fiber be noticeably more comfortable than aluminium one?
1
vote
2answers
482 views

BB height when change 29er wheel to 27.5 wheel

I have a 29er frame Specialized Camber Expert Carbon EVO with 330mm BB height with 120mm 29er fork How much with the BB height be altered if I change to 650b wheels and 27.5 140mm fork? EDIT The ...
2
votes
1answer
172 views

134mm rear dropout spacing on Al frame

My bike has an aluminium frame and I measured 134mm rear dropout spacing. The wheel it came with has 130mm OLD. The dropouts are quite a bit flexible, the QR pulls them in on tightening. This is the ...
0
votes
0answers
93 views

What are the most common frame materials?

Does anyone have stats on how many bikes overall there are worldwide based on frame material? Either percentage or count would be sweet to see. Bonus if it's broken down by country-level and/or type ...
-2
votes
1answer
100 views

Find my frame game :)

I need a little help to find out what brand this frame is. Components info: Complete Shimano Dura-ace black first gen (GA-200) except front and rear hub from Campagnolo. Wheels are old Weinmanns. ...
2
votes
1answer
215 views

Replacing bike frame on BMC Alpenchallenge AC01

I have a BMC Alpenchallenge AC01 IGH Alfine 8 Speed 2017 size small. Although the size is appropriate for me, I would prefer the medium, but the small was 47% off, so I bought it. Now I have the ...