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Questions tagged [dropouts]

For questions about dropouts on bicycles. Dropouts are a kind of fork end where the wheels are attached; we often use "dropout" for any slot to hold the axle at the end of forks, but strictly speaking, a dropout is a fork end where the wheel can be removed from the frame without taking the chain off first.

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135mm rear hub with QR on 130mm rear dropout spacing on older aluminum frame MTB

Problem: I had a rear wheel built to 135mm, but the frame is 130mm. The frame is an older aluminum MTB frame. I assumed it was 135mm rear dropout spacing (being a mountain bike) when ordering the new ...
E2R0NS's user avatar
  • 123
0 votes
1 answer
39 views

Fitting dropbars on Whyte 429 - advised road levers wont match Deore rear-mech, Alternative wanted matching rear mech/gravel shifters

I have a Whyte 429, aiming to switch to drop bars but not sure I can match the rear mech with Road/lever shifters. Seeking an alternative, i.e., installing a matching rear mech and road/gravel ...
Iain's user avatar
  • 1
4 votes
1 answer
307 views

Converting Belt Drive Bike With Paragon Sliders to Conventional Cassette

My internal gear hub broke on tour in Kenya, and now I'll need to convert my bike to use locally available parts. The frame uses Paragon Machine Works sliding dropouts who makes inserts which would ...
Laoshi's user avatar
  • 739
4 votes
1 answer
195 views

Rear dropout nut constantly slipping

I've had this issue with my Kalkhoff Agattu (now out of warranty) basically since day one. The nut on the drive side of the rear dropout doesn't hold the wheel tightly enough, and it gets gradually ...
user72619's user avatar
3 votes
1 answer
88 views

Are locknut forks and quick release forks the same and interchangeable?

I have a frame+fork that had old style locknuts on the wheels. I used those wheels for a project. Now I want to put wheels back onto this frame, but I only have quick release wheels in the same size. ...
i_like_bikes's user avatar
3 votes
4 answers
577 views

How do you keep disc brakes on internal hubs aligned with the caliper?

I'm contemplating building up a new commuter bike, and I'd like internal gearing and disc brakes. Internal gears require horizontal dropouts. Disc brake rotors however must be aligned with the caliper ...
generic_user's user avatar
1 vote
1 answer
75 views

Loud squeal from front wheel - mechanical disc brake, QR axle

Been very frustrated with this. On my genesis croix de fer (less than 1 year old) I get a squeak or squeal that gets progressively worse as I ride. Particularly when going over rough ground or when I'...
Ally M's user avatar
  • 81
0 votes
1 answer
417 views

135mm Hub in 141mm Boost QR

I may be barking up the wrong tree, but I have the following project in mind. I'm looking to buy a bike (Giant Fathom E+EX) that is listed as having 141 QR Boost drop-outs in the rear. I want to ...
Pete's user avatar
  • 169
5 votes
1 answer
612 views

Nut dents on stamped dropout

Problem with stamped dropouts on singlespeed. There were dents from the nuts. It became inconvenient to operate the bike (the wheel is poorly fixed and constantly moves out). It is impossible to ...
dtn's user avatar
  • 153
2 votes
1 answer
373 views

Are dropout adjustment screws necessary on an indoor trainer?

I have a 2007(?) Cervelo P2C with horizontal rear dropouts, and I noticed recently that one of the dropout adjustment screws had bent. I plan to replace it, but until I do so is there any issue with ...
whege's user avatar
  • 123
4 votes
3 answers
458 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
3 votes
1 answer
151 views

Tire rubbing on frame

I have an old Sutter bicycle. I recently hit a curb which knocked my rear wheel out of alignment. When set all the way into the dropouts, the wheel touches the frame. I can fix this by putting the ...
Matt's user avatar
  • 33
4 votes
1 answer
807 views

Protecting Threads on a thru-axle dropout

My bike uses a thru axel and as I use an indoor trainer quite a bit, I remove the back wheel quite often. I'm concerned about the threads. If they get destroyed on the dropout nut, the manufacturer ...
Killesk's user avatar
  • 163
2 votes
1 answer
422 views

What is the minimum end-cap diameter that a 12 mm fork should accommodate?

I have a fork with a 12 mm axle. As it happens, the flat part inside the dropout that buts up against the hub end-cap is large enough to accommodate a hub designed for a 15 mm axle (using a reducing ...
Will Vousden's user avatar
  • 3,991
2 votes
0 answers
40 views

Are there tugnuts made to fit forward facing horizontal dropouts on a Pashely Parabike? [duplicate]

Are there tugnuts to fit forward facing horizontal dropouts for a Pashley Parabike? Internal gear hub.
Tony McDonald's user avatar
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
1 answer
332 views

Wheel not straight in dropouts - can this cause brake rub?

My front wheel is not straight in the fork dropouts. It's been like this since I've bought the bike second hand a few years ago. See pictures below. I've tried installing an identically sized wheel ...
user4520's user avatar
  • 563
7 votes
4 answers
2k views

Dropout damage mystery, how to fix it? [Photos and videos]

This is a 90's aluminium frame with 130mm spacing between dropouts which originally had a 7 speed cassette. 2 years ago I changed the rear wheel for a standard 135mm and put a 9 speed drivetrain. I ...
tweedi's user avatar
  • 587
2 votes
2 answers
1k views

How to straighten wheels on unbalanced forks dropout with quick release?

In mass consumer bicycles it is often the case that the forks dropouts are not perfectly aligned with each other; this results in the wheel not being aligned with respect the fork and being tilted to ...
Vicente Bolea's user avatar
3 votes
1 answer
361 views

How to adjust chain tension on a rohloff hub with semi-horizontal dropouts

Not sure my question makes sense, I do not know how to call these dropouts. And I do not know much about Rohloff hubs and chain tension requirements. My problem : my chain is too loose and fall off ...
Jean-Baptiste Rudant's user avatar
4 votes
2 answers
258 views

Dropouts too short for internally geared hub

I am trying to change from a derailleur system to an internally geared hub (Sturmey Archer S-RF3 3). However, it turns out that the dropouts of my frame are too short for the anti-rotation washers ...
Stücke's user avatar
  • 1,508
6 votes
5 answers
3k views

Rear wheel won't stay in position

I'm a bit at my wits' end (not that I know that much about bikes). I used an old Gazelle Formula Randonneur frame and switched out most of the parts. However, after some time of (rather light) driving,...
ljrk's user avatar
  • 161
1 vote
1 answer
454 views

Purpose of this screw on my mountain bike's (BCA 29SC) rear dropout/derailleur and how to fix?

so recently I have been having problems with my bike: the wheels tended to slip out of the dropout and rub against the frame of the bike. However, I had found a way to fix (reorient) the wheel ...
Legend ile's user avatar
2 votes
1 answer
2k views

Rear dropout with adjustments screws of a single speed bicycle

I have got a single speed bicycle (Pure Fix Original Series) and I need to remove the rear wheel to the replace the punctured tube. The rear dropout has adjustment screws (I am not sure if this is the ...
Cm7F7Bb's user avatar
  • 155
5 votes
2 answers
824 views

Conversion to horizontal dropouts (for fixed gear), V-brake

If I convert vertical dropouts (as on picture) to horizontal dropouts as on youtube video by cutting and welding: . Will there be any challenges with the V-brakes ? If ...
Michael D's user avatar
  • 828
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
1 vote
1 answer
645 views

Aluminum (6061) frame dropout squeeze

I have a bicycle with a 6061 aluminum frame. I had to replace the rear wheel, and I bought a wheel with an axle length that is a few mm short for the dropout spacing. In order to fit the axle into the ...
Ferenc 's user avatar
3 votes
1 answer
1k views

Front wheel tilted fork alignment problem

I have this Dawes Discovery Twin and there seems to be a problem with one, or maybe both, of the quick release dropouts. The front wheel tilts a little to the right and rubs the brake shoe. I already ...
Richard Osseweyer's user avatar
3 votes
2 answers
422 views

Building up a 1988 Schwinn Circuit frame with new parts

I’m very new to vintage road bikes, I’ve had an 1988 Schwinn Circuit frame laying around for years. Is it possible to build it up using newer components? I understand that it originally came with an ...
Nick Alonge's user avatar
6 votes
3 answers
4k views

How to enlarge dropout slots?

I have a Raleigh Grand Prix and was trying to put a modern wheelset on it, but the front dropout slots are too narrow to fit the axle. Is it safe or possible to enlarge the slots? The fork is chrome ...
justin's user avatar
  • 379
3 votes
2 answers
2k views

Filing front dropout

While carrying my road bike via plane one of my front dropouts has been bent slightly so I can't easily install or remove my front wheel. After I inspected the dropouts I found that one of them has ...
Efe Can's user avatar
  • 177
0 votes
1 answer
226 views

70's Peugeot to Fixed Gear Conversion

I have an old 1970's Peugeot frame (originally a 10-speed, I believe) that I have been slowly trying to convert to a fixed gear bike. I am at a complete loss for which wheelset is appropriate. I have ...
ASAP Scramz's user avatar
3 votes
2 answers
383 views

How is chainstay length defined for frames with horizontal dropouts?

Just reading our own definition of Chainstay Length in the terminology index. It is written currently as the distance between the centre of the chainring and the centre of the rear cog. This is ...
Swifty's user avatar
  • 12.8k
4 votes
1 answer
1k views

Can I use slider dropouts on my track dropouts?

My bike's dropout/fork-end basically look like this: and I wonder if I could use something like this to convert it into a vertical dropout with a hanger and disc caliper mount: I'll only be using ...
Gregory Leo's user avatar
  • 1,305
2 votes
2 answers
253 views

Vertical dropout chips for Civia Bryant

I have a Civia Bryant that has horizontal dropouts and an Alfine rear hub. The Bryant had interchangeable vertical/horizontal dropouts I didn’t get the vertical dropouts from the shop when I bought ...
Chris Giles's user avatar
3 votes
2 answers
272 views

Why aren't vertical dropouts truly vertical?

Making some custom rear dropouts (vertical) for a project (nonstandard bike, they must be custom) and as I look to dropout examples, I notice that "vertical" dropouts never seem to have the slots ...
user avatar
7 votes
2 answers
3k views

Anti-rotation washers (non-turn) washers in non-parallel dropouts?

I have a Shimano Alfine 11 Interally-geared hub and am fitting it to an "M5 559 shockproof" recumbent. The wheel is built and true and runs nicely. However I have a problem with the anti-rotation ...
Criggie's user avatar
  • 125k
1 vote
2 answers
808 views

Bike axle block/reverse chain tug?

I just recently obtained a classic style bike frame that has horizontal fork-ends (people call them dropouts but they're different). I wanted to use hollow axles and skewers on this bike but I think ...
Gregory Leo's user avatar
  • 1,305
4 votes
5 answers
3k views

How to install a Rohloff Speedhub on a Surly Troll with rear facing horizontal fork ends

I have a Surly Troll with rear facing horizontal fork ends. Is there a recommended way of installing a Rohloff Speedhub 14 on the Surly Troll? These answers mention tugnuts and washers, but perhaps ...
user avatar
1 vote
2 answers
2k views

Specialized Rockhopper derailleur hanger needed.....which one?

I need to know which drop out hanger I need for this Specialized Rockhopper. Part of the frame is chipped at the dropout but it will still bolt on. I just don't know which hanger I need.
puzylo's user avatar
  • 11
2 votes
2 answers
2k views

Can I replace a 135mm/5mm QR hub with a 10mm-diameter IGH?

I have a bike whose rear wheel has "quick-release 5 x 135mm". Will I be able to replace this rear hub with an in-gear hub that has "Length 135 mm, Axis diameter 10 mm" (this is the N380 hub)?
Dmitri Nesteruk's user avatar
1 vote
1 answer
770 views

Cannot fit wheel into dropouts

I recently bought a wheelset that supports 11sp and 10sp casettes. The wheelset came with a 2ish mm spacer. I have previously owned a 10sp wheelset that had a 1mm spacer. I have been told that for 10 ...
zython's user avatar
  • 381
2 votes
1 answer
206 views

Can I upgrade a Hercules Dirtrider 26" with gears and a disk brake?

I found that dropouts are needed for derailleur setup & fork space>120mm...can I install any hanger or weld a dropout to the frame?...and also the fork end gap was around 105mm in wheel fitted ...
alex'97's user avatar
  • 21
7 votes
1 answer
3k views

What is the purpose of this rear dropout screw?

I am a long time MTBer who just got my first road bike. This is a photo of the left rear dropout. The screw I'm talking about is the little silver one just above the axle. There is a groove cut into ...
Dave Johnson's user avatar
2 votes
1 answer
590 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 ...
aspseka's user avatar
  • 357
2 votes
1 answer
1k views

Is it possible to mount a derailleur on this bike?

Is there a way to mount a derailleur on this bike?
user430's user avatar
  • 733
2 votes
1 answer
1k views

Is this just the paint cracks?

It is on the dropout of my new tarmac, one month old. The shop owner said "It's normal for this side to crack it might be from the chain" But when I did test the chain it didn't touch the frame (...
TaEy Suriyasakorn's user avatar
1 vote
1 answer
285 views

Rear wheel drop-out adjustment (1-speed)

I've got round to my Twenty/Shopper and besides replacing the tyre also went ahead and got a new KMC chain. Of course, the links were somewhat shorter, and so I couldn't cut it just right without ...
4004's user avatar
  • 25
1 vote
3 answers
407 views

Dawes Galaxy OLN and horizontal dropouts

I want to build up a steel framed commuter/light tourer/utility bike with hub gears. A Dawes Galaxy from the 1990s era looks about right to provide the frame. But I want 135mm rear dropout spacing (...
Mike Lyons's user avatar
2 votes
1 answer
680 views

Locking Skewer slipping from rear wheel dropout

I recently purchased new locking skewers (Kyrptonite WheelNutz) and they're slipping out of rear wheel dropout with little force. I've noticed they have zero bite on the nut compared to other skewers. ...
Ryan's user avatar
  • 123