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.

Filter by
Sorted by
Tagged with
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 ...
0 votes
0 answers
27 views

Internal gear hub - missing parts

I've recently bought a wheel with Shimano Nexus SG-C3001-7R hub. There are some parts missing on it, including sprocket: I already have the compatible shifter (SL-7S50), but it ends with just bare ...
3 votes
1 answer
94 views

What is this part?

I replaced my back tire. After putting it back on, I noticed this under the toolbox. Only one. It is either from the circular disc brake thing on the right, or the gears on the left. I thought it ...
1 vote
1 answer
82 views

Where in the world can I find a replacement schwinn cup-holder as used on many cruiser bikes for decades? [closed]

As recently as 2018, schwinn catalogs had a “cup-holder series” of cruisers, with a plastic and foam cup holder fitted at the front between the twin top tubes. It degrades under UV, sunlight. I think ...
2 votes
3 answers
1k views

Name this small red plastic bicycle part

Please help me to identify this part. The pictures show rear wheel. UPD: It is more like an adaptor to connect to the bicycle.
3 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 ...
3 votes
2 answers
147 views

Vintage derailleur identification

I have a vintage Shimano derailleur that I'm trying to identify, specifically to figure out which jockey wheel set is compatible as mine badly need replacing. The derailleur is marked "Shimano ...
3 votes
4 answers
278 views

Can anyone help me identify this stem binder nut

This nut (pictured) fits the binder bolt from a vintage 3ttt stem. I would like to know the name of this nut, or the type of nut this is so that I can try to buy more. So far, I've found similar ...
7 votes
1 answer
571 views

When replacing balls in Shimano cup and cone bearings, is part number relevant or is size the only thing that matters?

Does the shimano part number matter when replacing the balls in cup/cone hubs? The exact part number is unavailable, and the available shimano bearing of right size does not list my hub as compatible. ...
7 votes
1 answer
659 views

Why do threadless stems allow quick removal of the bars whereas quill stems do not?

I prefer quill stems for aesthetic reasons but find them a hassle when it comes to removing the handlebar -- having to strip the bars and remove the brifters. Is there a reason why I cannot find quill ...
8 votes
1 answer
2k views

What is this U shaped metallic piece with 2 holes?

I recently assembled a new bike I bought, but this piece was not mentioned in the instruction manual and I was not able to figure out by searching myself either. I tried putting it under the seat but ...
28 votes
7 answers
5k views

What should I look for in clipless pedals and shoes?

I am just thinking about investing in some clip-in pedals (and presumably shoes). I want to use them mostly on my older road bike but in the future I might want to move them over onto my mountain ...
9 votes
4 answers
3k views

New, cheap mountain bike: What's most likely to break?

I have a very cheap (less than USD $100), new mountain bike I'm about to break in on a 2-4 hour ride on a mountain trail. I'd like to be prepared for equipment failures or problems - can anyone ...
8 votes
1 answer
506 views

Did this part come from my bicycle?

I was working on my bicycle, a 2021 Domane SL5, and laid it on the ground. When I picked it up, I saw a small metal ring on the ground underneath. I don’t know for certain if the metal piece came off ...
2 votes
3 answers
747 views

HELP with derailleur upgrade question

I just bought this Aventon Level ebike https://electricbikereport.com/aventon-level-review/ I was wanting to upgrade the derailleur, but I'm not sure which one to get. I don't want the entry level/...
10 votes
4 answers
39k views

Is it possible/sensible to add a suspension fork to an old mountain bike?

I have a ~1993 Giant mountain bike. It's not great, but I am a very new and casual rider. The bike has a solid fork and it makes for the predictable rough trail ride. The trails are generally ...
1 vote
1 answer
79 views

Replacement for VP-BC73E Bottom Bracket

I cannot find my bottom bracket online anywhere. It's called "VP-BC73E ". However, I can find loads of "VP-BC73" (E is missing). Would it still fit/work? I found this information ...
12 votes
1 answer
1k views

What is this part that came with my eggbeater pedals?

I bought some second-hand Crank Bros Eggbeater pedals. They came in the original box, apparently with all the bits except the cleats. (That's fine. CB cleats are effectively a consumable.) One of the ...
2 votes
0 answers
94 views

Look at my trike

About 21 days ago exactly I posted for help identifying some junk in a barn. Today i can show you what these parts were supposed to look like. I've figured out a bunch during the process. The lever ...
1 vote
1 answer
190 views

Fit a M3 metal screw into a M5 hole

I have a M5 threaded hole into which I need to fit a M3 screw to hold some accessory. I'm looking for the name of the piece I need to make that fit possible. The closest I found are these kind of ...
4 votes
3 answers
4k views

How much faster would I go with a better road bike?

I have a Cannondale CAAD9-5. Over an identical distance with identical power output, how much faster would I go with a better bike? And what are the things that would lead to the greater speed (just ...
3 votes
3 answers
1k views

Find replacement battery for this e-bike

My ebike battery totally died today. I can't find the model number for the battery as it is not written anywhere. Here are the pictures:
1 vote
1 answer
59 views

How do I find replacement parts for my 1988 Suntour drive train?

I am resurrecting my old commuter which was basically a hard-tail MTB c 1988 with a 3 x 7 Suntour system. What's the least painful method (leaving shifters and derailleur intact) to replace the worn ...
4 votes
2 answers
455 views

Replacement Hoods for SRAM Rival 1 Levers

I have a 2020 Kona Rove ST with SRAM Rival 1 shifters/levers/a brifter. It's a 1x11 speed. My local bike shop recently did some work on my bike, and it seems they tore my hood. It was definitely not ...
0 votes
2 answers
128 views

Options for renewing drivetrain / upsizing crankset

I currently have a Shimano drive-train and am approaching replacement for the chain and cassette. All parts are Deore XT M780 Series except my cassette which is a HG500-10 11-25 I usually run a ...
5 votes
1 answer
876 views

What is this little plate found in the Ultegra groupset kit?

I'm a about to install a Shimano Ultegra groupset on my road bike, but I have found a little rounded plate with a sticky band on it, and I don't have any idea of what it is and where to put it. How ...
4 votes
3 answers
511 views

Where did all the Shimano non-electronic groups go?

I wanted to upgrade the components on one of my bikes, from Shimano 105 6500 (1998 9-speed) to 105 R7000 (2018 11-speed). But no reputable online shop has them. And the LBS says they can't get any 105 ...
2 votes
0 answers
81 views

Cable housing end cap for BR-M375

I replaced the no name brake calipers on an entry-level ebike for Shimano BR-M375. The cable housing for the rear caliper was a bit too long, so I cut off a few centimeters. Then, I put a new 5 mm end ...
2 votes
2 answers
669 views

Aftermarket options for adjusting Giant Aero Bars angle

I have this Giant 2016 Trinity Pro that I'm trying to make some adjustments to. Currently the stock aero bars stick almost straight out and I'm not super happy with that position. I've really liked ...
21 votes
7 answers
16k views

What is the biggest component difference between a cheap road bike and an expensive road bike?

I am shopping around for road bikes now, and I wanted to know what components to look for. I am not talking about the frame, carbon or otherwise, I mean types of shifters, brakes, cranks, rims, etc.
2 votes
2 answers
399 views

How to measure sealed headset bearings angle?

I need to find a replacement headset for an integrated system "IS". I can get the required dimensions by removing the fork and taking headtube and steerer tube measurements by using a ...
5 votes
2 answers
769 views

Is there an easily recognized name for this kind of kickstand?

I'm looking for the vocabulary to describe a kind of kickstand that seems pretty much unheard-of where I live. I've seen them particularly on Japanese utility/commuter bikes. The key features are: ...
11 votes
1 answer
1k views

What's the name of the piece that holds the fender on (pic attached)

What's the name of this part that holds the fender on? (the back piece between that the rod from the fender is going through) I've lost one but for the life of me can't seem to find what to search ...
9 votes
2 answers
612 views

What small parts should I be mindful of when buying a frameset?

I have a project of building a touring bike from scratch by cherry picking every component. I started looking at some potential framesets. One of the candidates is the Surly Disc Trucker. I can see on ...
3 votes
2 answers
400 views

Help identifying and sourcing a part for Shimano brake lever

A few weeks back, when trying to refit the v-brakes on my son's MTB after taking the wheel off, I shattered a threaded plastic washer on his Shimano brake & gear lever (ST EF500). I call it a ...
5 votes
2 answers
639 views

Front Brakes - replace missing part or entire assembly?

I found a project bike that was missing some things and I decided to fix it up. The first image is of the front brake which is missing the piece that clips onto the brake cable. The second image is of ...
21 votes
7 answers
5k views

How maintenance-free can a commuter bike be?

Commuting is hard on bikes, especially when doing it all-year long. Maintenance is essential to assure one can get to work every morning without issues but it takes time and care. Fixed-gear and ...
1 vote
1 answer
139 views

What are the dimensions of a Trek Marlin 7 rear wheel quick release skewer?

My Trek Marlin 7 is size large and has 29-inch wheels. I want to replace the broken quick release skewer of the rear wheel and I need help finding a suitable replacement.
10 votes
4 answers
3k views

Is it okay for my rear derailleur to be as "compressed" as this when in the lowest gear on the bike?

Recently replaced the cables on this old road bike. When indexing the cable I notice how compressed this derailleur is and the two cogs are almost touching - it certainly doesn't look right to my ...
4 votes
3 answers
923 views

Where can I buy a radiused washer?

I recently bought a new set of Tektro R539 Caliper Brakes. These brakes are nutted (non-recessed). Each brake came with one curved (concave, radiused) washer and one flat serrated washer. My front ...
1 vote
1 answer
227 views

Is there a complete list of all Shimano bicycle components?

You can search for specific components on si.shimano.com and VeloBase has a huge database of Shimano components, but it's far from being complete. Is there a definitive list of all Shimano components ...
9 votes
1 answer
446 views

How should I go about getting parts for this bike?

Backstory I moved into a place and there was an old bike with the wheels & handlebar off. The landlord said I could throw it away but instead I want to try and fix it but it turns out I don’t know ...
4 votes
1 answer
863 views

What is the purpose of non-series Shimano components?

Shimano have many series of components corresponding to different grades and categories of bikes (e.g. their high-end series for MTB is XTR while Dura-Ace is for Road), but they also have what they ...
18 votes
4 answers
16k views

How are these plastic rings used on my Shimano disk brake mount adapter?

I boughtt a Shimano SM-MA-R160 Disc Brake Mount Adaptor for my bike. It came with these black plastic things in the lower right corner of the photo below. I have a bunch and don't know what are they ...
0 votes
0 answers
97 views

Schwinn AC Performance Plus with Carbon Blue Pedal Exchange

I want to switch out the pedals on my Schwinn AC Performance Plus with Carbon Blue for the Venzo 3-in-1 pedals (I only use SPDs & don’t like the sneaker cages). On the Venzos, the part that ...
4 votes
1 answer
149 views

What is this tiny part for on the RST 790 fork?

The following picture shows an RST 790 fork from 2010. Anyone knows what the tiny part pointed by the red arrow is for? This part is also present on the RST 777 fork. From another angle and zoomed in:...
12 votes
2 answers
2k views

Gates CDN - frequent belt failures

update at the bottom I ride a belt drive bike fitted with a Gates CDN front sprocket (on the crank), a CDN belt and a CDX rear sprocket. Around the 2200km/1400mi mark, the CDN belt failed and teeth ...
3 votes
1 answer
814 views

Fuji bolt fell out please help!

Hi all. I have an old Fuji and there's a bolt that holds the crank in place. It fell out and is lost unfortunately and I am looking for a new one. Does anyone have any ideas? I'd really appreciate it!
10 votes
4 answers
5k views

Can a counterfeit Shimano chain be used on an authentic Shimano drivetrain?

I unwittingly purchased a fake CNHG901 HG-X11 chain for my Shimano 2x11 M700 groupset because my original chain already had 0.75 wear. I was naïve to think that I'd actually get a legitimate chain ...
5 votes
2 answers
777 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 ...

1
2 3 4 5
9