Questions tagged [parts]

Bicycle components without which it's not a working bike: wheels, brakes, saddle/seat, bottom bracket, derailleur, stem, handlebars, bolts, etc. Also tag with specific part.

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Can't find a "friction screw" for a friction shifting system

I recently broke one of the two speed levers ajuster (friction screw) that adjust the pressure between the levers and the cable. It's made in plastic as shown in the picture below. I would like to ...
Gabriel's user avatar
  • 31
0 votes
2 answers
125 views

Commuter/ road bike from a MTB frame

I have an entry-level 27.5 mountain bike and I will be moving to London this summer. Since I won't be riding it on trails anymore I thought I can keep the frame and wheels and build a commuter bike or ...
Marian Gartu's user avatar
1 vote
0 answers
1k views

Shimano 9 Speed Cassette with Microshift Advent 9 Speed Road Shifter

I fancy setting up my old but amazing Cannondale F1000 with a dropbar and corresponding road shifters.The only affordable system I could find for that is the Microshift Advent 9 group. I'm happy with ...
SuperHannes's user avatar
2 votes
2 answers
154 views

Should "universal pedals" be avoided?

Are universal pedal axles weaker than standard axles? If so, should they be avoided? These are inexpensive pedals so let's focus on inexpensive normal, solid axles vs these universal pedals. Each ...
David D's user avatar
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4 votes
3 answers
2k views

Does the front derailleur limit chain ring size?

Does the front derailleur have limits to which size chain rings can be used? I have a groovy old 1988 Schwinn Prelude and for the most part it does just what I need. However there are some steep ...
Ben's user avatar
  • 89
1 vote
2 answers
3k views

What would you upgrade first on a road bike?

I have a Decathlon Triban RC500 with all stock components which I'm quite happy with. Since I have cash to burn (actually not, this question is hypothetical :)) what component should I upgrade first ...
Stand with Gaza's user avatar
2 votes
2 answers
3k views

Is there any builder site for bicycle?

Say you want to build entirely your own bike, from frame to ring bell. Is there a site that can help you with compatibility among all parts? Or maybe you just want to upgrade your crank set but you ...
Eliseo Ocampos's user avatar
10 votes
4 answers
3k views

Is it a good idea to buy second hand bike model that has been discontinued?

I am a new rider looking for a road bike. I found a deal to buy second hand 2017 Orbea Avant M40 size 51 for $800. I see that this model is discontinued by Orbea. Will it be a problem to find parts ...
user47370's user avatar
  • 101
1 vote
3 answers
2k views

Two handlebars on bicycle

I have butterfly shaped handlebars on my hybrid bicycle. These were an aftermarket addition. These allow for different positions but I would like to add another set of handlebars with a wider ...
motionpotion's user avatar
2 votes
3 answers
241 views

What factors to take into account when choosing a hybrid bike?

I've decided I'd like to start commuting to work, but I'm not sure what factors I need to take into account when choosing a bike. I figured a hybrid bike suits my needs best, since I will be riding on ...
Hani's user avatar
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0 answers
105 views

Small part for Shimano 105 brakes [closed]

My road bike has Shimano 105 brakes, circa 2003. Today, I removed the shoes from the front brakes, unscrewed the "fixing screws", and slid out the pads, so I can put in new pads. Somehow, for one of ...
Paul Steckler's user avatar
4 votes
2 answers
622 views

Help identify fender mounting clamp?

My bike has metal fenders that attach to the frame through ~3mm steel arms that are clamped and held in place with a piece of plastic that is screwed to the frame (M5 bolts) - as shown on the photo. ...
Dmitry Alergant's user avatar
3 votes
3 answers
328 views

Bike spare parts in South America

I'll soon start a rather long trip from Ushuaia in southern Argentina to Alaska in the north of North America. As I'm from Europe (France), I don't really know what to expect about spare parts for my ...
Shan-x's user avatar
  • 195
8 votes
4 answers
19k views

How to identify counterfeit Shimano parts?

I bought a pair of Shimano brifters from eBay, brand new. They have a few bumps and marks on the plastic and metal parts that look like poor quality manufacturing to me. Can anyone tell from these ...
Elliott B's user avatar
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6 votes
6 answers
8k views

Can a new chain significantly improve the riding experience? If yes - what else can?

I am a casual commuter (in average 2 days per week, 30 km per day), on a generic bike which I bought a few years ago. Yesterday I took the opportunity of having the bike reviewed and the chain and ...
WoJ's user avatar
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1 vote
2 answers
118 views

What are these parts and how to remove them without a tool

Are the two being symmetrical part circled in blue the following picture DU bushings ? How could I remove them without the appropriate tool ?
Olórin's user avatar
  • 177
3 votes
3 answers
2k views

Brompton Rear Brake Caliper Assembly Schematic

What is the list and order of components that thread onto the Brompton's rear brake assembly from the brake caliper through to the Lower Stop Disc for an M6R? At some point on a recent ride down ...
qzcft's user avatar
  • 91
2 votes
1 answer
2k views

What are the axle nut sizes on the brompton?

What are the exact specifications of the nuts used on the various axles of the Brompton bicycle? Specifically, I have a 2016 M6R black, but I would appreciate it if you listed the specifications for ...
qzcft's user avatar
  • 91
3 votes
2 answers
1k views

How to find a replacement and replace a broken kickstand?

My bike came with a kickstand, but today after a ride I noticed part of it had fallen off somewhere, as shown in the picture below: It used to look like this: As I don't have the part of kickstand ...
Teemu's user avatar
  • 51
24 votes
1 answer
6k views

Random piece of plastic

I have recently purchased a hybrid bike with suspension (not sure if that is relevant to this question). It came with two pieces of plastic. Any ideas what they may be for?
RADAR's user avatar
  • 341
2 votes
1 answer
2k views

How do I choose a replacement wheel rim?

These are my current rims: Wheeltech TD26 by Alex Rims (can't find much info about these online). I need to replace the rear wheel as it is cracked (cracks on the rims around a few spokes) It's a ...
kovacsa's user avatar
  • 31
2 votes
1 answer
3k views

Any compatible trigger shifters for el-cheapo TD ONE derailleur?

Bought a cheap RoadMaster MTB's as a first "grown up" bikes for my daughter. For the price (~$60 in a sale) they play nicely, but it shows the poor quality of the components. The biggest gripe is the ...
ysap's user avatar
  • 181
1 vote
1 answer
232 views

Can't tighten thru-axle

Long story short, my cone nut came off while riding. Can I put it back without dismantling my freehub? And why I can't tighten my axle anymore? Only way I can tighten axle is without wheel. As soon I ...
Edgars's user avatar
  • 11
3 votes
3 answers
4k views

Replacement stem cap and bolt

Our oldest son has been alternating between mine and my wife’s bike (Carreras from Halfords) whenever he has to go anywhere, but over the last week or so we noticed he had stopped using my bike, ...
Alex Goldie's user avatar
7 votes
3 answers
8k views

How to improve/restore vintage Peugeot bike, or is it even worth it?

I've got an old Peugeot bike I've been riding, and I like it but I'd like to make it better for long rides. I'd like to replace some parts, the steel rims aren't good for braking and I'd like ...
bidart's user avatar
  • 93
0 votes
0 answers
435 views

What are my options - TA to QR conversion

I’ve just bought these wheels on gumtree and didn’t realise they were thru axle as I require quick release for my cx bike (BH RX team cross 2014 https://issuu.com/bhbikesusa/docs/bh_bikes_2014-...
jpearce13's user avatar
1 vote
2 answers
5k views

Rusty brake nuts & cables: Should I change my brakes or not?

I have been using a used bike for a few months now and when I bought it it was in mint conditions. However, the winter has been really harsh were I live and since I drove every day to work with it ...
eslukas's user avatar
  • 119
1 vote
1 answer
344 views

Is there a front derailer type that can be mounted on a frame without braze on or fitting on the seat tube, or clamping?

As the question says, is there a front derailer type that can be mounted without having a fitting or braze on on the seat tube, or without clamping to the seat tube (because it's a weird shape, or ...
diestl's user avatar
  • 213
3 votes
1 answer
3k views

Are road bike shifter hoods compatible across models?

I've been using Shimano Sora Shifters since about 2012 .. probably one generation before the current (https://bike.shimano.com/en-EU/product/component/sora-3500/ST-3500.html) The rubber covers are ...
Edmund Fong's user avatar
5 votes
2 answers
751 views

What is this part of a bicycle trailer called, and where can I find a replacement?

I have a Schwinn double bicycle trailer for my kids, but it is broken. The black plastic part pictured fits at the base of the right wall and connects it to the trailer frame. A bolt goes through the ...
Matthew Rathbone's user avatar
1 vote
1 answer
1k views

Finding compatible fixed-gear cog and lockring

I have a flip-flop hub that came stock on a Trek single-speed. I'd like to install a fixed-gear cog and lockring opposite the existing freewheel. How can I determine which cogs and lockrings are ...
rlkw1024's user avatar
  • 111
7 votes
3 answers
2k views

5 arm cranksets versus 4. Which is better and why?

I'm looking to buy a Sora triple crankset. Shimano make two types, one eith 5 arms, and the other with 4 arms1. Which should I get and why would that be a better choice? I'm a slow-ish rider. I'm 50 ...
user avatar
1 vote
2 answers
83 views

Can a cyclometer be used with any bicycle?

I just want to know if a cyclometer can be used on any cycle or just on those made for racing or touring. Thanks for your answer in advance.
Subhodeep Mukherjee's user avatar
2 votes
2 answers
5k views

Where to get replacement bike frame cable entry grommets?

Does anybody know where to get more of these ? These hold shift and/or brake cable ferrules where the cables enter the frame. Here is what they look on a bike if that helps: These specifically are ...
cdahms's user avatar
  • 887
3 votes
1 answer
4k views

Ordering correct spoke nipple size

I've got some spoke nipples on a rear wheel which are stripped, and I'd like to replace them. I've measured the thickness of the spokes and they have a diameter of 2mm, which correspond to 14-gauge ...
Nestor's user avatar
  • 33
4 votes
4 answers
984 views

What should be my first upgrade?

I've been planning to upgrade my Foxter Evans 3.0 (Low budget Bike) to lessen it's weight. What should I replace to lessen it? Also I'm a 5'11 person and my frame is a medium. Should I consider ...
Earvin Nill Castillo's user avatar
0 votes
1 answer
612 views

What is an equivalent or compatible chainring for this Deore XT "24-AM" chainring?

I have a 2012 Mountain Bike with Deore XT. While troubleshooting chain suck on my inner chainring, I figured I'd order a new chainring and replace it. The chainring only has "24-AM" on it. However, ...
Jay Cummins's user avatar
9 votes
3 answers
11k views

Can a Shimano XT (mountain) hydraulic disc brake caliper be used with an Ultegra STI road brake lever?

Specifically, is the XT BR-M8020 mountain caliper compatible with an Ultegra hydraulic road brifter like like the ST-R8020 or ST-R8070? I have confirmed that they both use BH90 brake hose ("high ...
John McD's user avatar
  • 175
3 votes
2 answers
2k views

What type of rear derailleur is used on my bike?

Direct mount or hanger mount? Sooo, one glance at these photos will tell you why I'm asking this... Needles to say, I need a new one and I'd like to know what I should be looking for. It's for a 21-...
Alex's user avatar
  • 33
0 votes
3 answers
651 views

I'm looking for a part that connects the saddle to the body frame of the bicycle

I recently removed the saddle because it was squeaking a lot, then I cleaned the inside and put oil back in, however I couldn't re-attach the bar under the seat to the body frame, then I used this ...
user39781's user avatar
2 votes
1 answer
265 views

What is this crank part called?

I recently had a Shun SS-8001 crankset fail. When taking it apart, I saw that the right pedal has a sort of stop ring that prevents the pedal, presumably, from unscrewing itself: Now I need to find a ...
Dmitri Nesteruk's user avatar
2 votes
1 answer
2k views

How do I figure out what crankset replacement will fit my derailleur?

I have a bike with a Shimano FC-M560 crankset in the front which I want to replace. I naively bought a Shimano FC-TY301 crankset, thinking that there's norms and that 3-speed cranksets are more or ...
oarfish's user avatar
  • 415
3 votes
1 answer
159 views

How can I un-seize track nuts?

I bought a set of these about 18 months ago now and for a little while they continued to work as they should but then now they're seized up. Is there anything (short of ordering another pair) I can ...
Matt's user avatar
  • 977
1 vote
1 answer
110 views

Is it possible to replace this quick release part on a Motiv Rockpoint?

My son has been using this bike, and the other day he came home with a bolt that had come off. I checked it out, and it looks like there's also another part missing—the other end of the quick wheel ...
Isvara's user avatar
  • 113
3 votes
1 answer
2k views

Repairing Shimano front shifter ST-EF41-L

My son's bicycle gear shifter SHIMANO ST-EF41-L (front 3 speed) malfunctioned (Both levers became free). I disassembled it and found 3 very small plastic parts on the bottom side of the shifter were ...
SUJOY NAG's user avatar
2 votes
0 answers
120 views

what is this piece of plastic? [duplicate]

Preparing to move, I found this together with the papers I got when I bought my bike. But what is it? Is it important? It is about 2cm long. I have four of these... Maybe related to the disk brakes? ...
Joachim Breitner's user avatar
1 vote
1 answer
425 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 ...
Neeku's user avatar
  • 277
1 vote
1 answer
975 views

Should I get a smaller chainring or bigger cog?

I built a single speed bike about a year ago, and am starting to change out parts to make it more comfortable for me. The first thing I'm wanting to change is the gear inches, which I didn't give much ...
TheStrangeQuark's user avatar
0 votes
1 answer
95 views

How to date my second hand bike [duplicate]

I am trying to get an online reference to the exact specs of my second hand bike. What are a) Some good techniques/things to look for? b) Some resources to help the dating process. E.g I see that ...
Karthik T's user avatar
  • 541
1 vote
3 answers
2k views

Correct clamped quick release lever direction

Which direction is the correct way for the QR lever to point when closed and why? I have found both upwards and backwards on different parts on the SRAM website even for the same forks. I have ...
piet's user avatar
  • 1,000

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