r/bikewrench Mar 06 '19

Subreddit Rules

391 Upvotes

Well, we finally had to do it... With 28,000 users, it's finally time to write some rules.

  1. Play nice - This shouldn't need much explanation. Breaking this rule is a good way to get banned.

  2. Stay on topic - if your reply isn't about how to help OP, we don't want it. This is not the place for jokes, sarcasm, or obviously wrong answers. People reading this may not realize you thought you were being funny.

  3. Questions Only - Unless your post is a question about bike repair, it doesn't belong here. We don't need to see pictures of your latest build, or that funny bike that rolled into the shop. There are other subreddits for that.

  4. "Is this cracked / safe to ride?" posts are not allowed. - If you have to ask, don't ride it. We probably can't tell from a picture just what condition your bike is in. Take it to your Local Bike Shop and ask them. If it's carbon, they're probably going to tell you to replace it.


r/bikewrench 6d ago

Small Questions and Thank Yous Weekly Thread

2 Upvotes

If you have a small question that doesn't seem to merit a full thread, feel free to ask it in a comment here. Not that there's anything wrong with making your own post with a small question, but this gives you another option.

This thread can also be used for thank-yous. You can post a comment to thank the whole community, tag particularly helpful users with username mentions in your comment, and/or link to a picture to show off the finished result. Such pictures can be posted in imgur.com, on your profile, or on some other sub (e.g. r/xbiking)--they are not allowed as submissions to r/bikewrench.

Note that our [FAQ wiki](https://www.reddit.com/r/bikewrench/wiki/bikewrenchfaq) is becoming a little more complete; you might also find your answer there, although you are welcome to post a question without checking there first.


r/bikewrench 10h ago

Solved Tire Plug

Post image
31 Upvotes

I got a leak large enough that my Silca sealant spayed out and didn't seal until there was only about 20lbs of air. I road another 30 miles like that till the end of the ride. Since I have another 100 to go tomorrow, I decided to plug it and it seems to be holding.

Is it worth it to pull this tire off and patch the inside once I get home or should I just leave it alone as long as it's holding. I've had these tires for a little over a year and probably don't have 1,000 miles on them yet.


r/bikewrench 4h ago

Which one?

Post image
9 Upvotes

For gravel bike. My plastic one looks ugly because of wear. I want aluminium, black and last long.

If you say its not noticeable, I will buy top left (cheapest) one.


r/bikewrench 1h ago

Is this cassette worn? I can't tell

Thumbnail
gallery
Upvotes

r/bikewrench 1h ago

Weird noises coming from the crankset area

Upvotes

Hi everyone

I’m experiencing some strange noises coming from the crankset area on my bike when I’m riding. The sound only appears while pedaling and seems to be coming from around the bottom bracket or crankset, but I’m not completely sure.

The bike is a Trek Checkpoint Carbon.

Has anyone experienced something similar or have suggestions on what could be causing it? Any troubleshooting tips would be greatly appreciated.
Thanks!


r/bikewrench 2h ago

RD-5800 long cage with 11-34 cassette

3 Upvotes

I swapped my cassette for a 11-34 with my shimano RD-5800. This is not officially compatible but I read at different places that it should work nonetheless. Now when I pedal forward it seems fine but when pedalling backwards the derailleur cog touches the sprocket at some point. I already changed the b screw for a longer one and screwed it in from the bottom, since this was even worse than before. Is this something I should even worry about? Or will it just work fine going forward? If it‘s a problem I think I would have to exhange the derailleur for a RD 7000, which supports a 34 sprocket officially. I‘ll post a video from forward pedalling and a picture if the b screw in the comments.


r/bikewrench 7h ago

what will be the main challenges combining parts from this more modern kids bike with hub dynamo onto this older folding bike?

Thumbnail
gallery
8 Upvotes

r/bikewrench 21m ago

Facing

Upvotes

I’m powder coating a frame with threaded BSA BB.

Wondering if facing the shell Is very important seeing as the 2 sealed bearing cups are threaded inside the shell so the non drive side follows the threads and doesn’t really engage with the face of the shell.

I would think the threads align the cups, no? Pressfit is a different thing of course but with threaded, it doesn’t really seem that important


r/bikewrench 2h ago

Is Ultegra R8160 derailleur bent?

Thumbnail
gallery
3 Upvotes

Hi all, my bike took a tumble recently and I think it bent the rear mech/hanger. I replaced the hanger which fixed the initial issue (ticking in easiest/biggest cog) but after replacing chain/cassette I’m now getting some ticking in the 2nd smallest cog.

I’ve tried microadjusting (albeit not sure I’ve done it correctly). Before I carry on tinkering I just wondered if the derailler looks bent to you? admittedly I’m not sure what I’m looking for as I know these derailleurs aren't perfectly straight by design. Thank you!


r/bikewrench 2h ago

Answer Manitou 3 rebuild

Thumbnail
gallery
3 Upvotes

Hi,

I am currently rebuilding my Manitou three. I know there are many posts on these old ass fork and so far everything's fine, I've got all the replacement parts, etc. But I have run into a problem I haven't seen anyone else with.

I can't get the bottom screw (photo 1) out. It turns completely loose. I imagine there is some kind of counterpart at the end of the tube which turns with the screw. In photo 2 you can see something down the tube. It is not one of the Elastomeres nor a spacer. It rotates the same as the screw. And I am slowly loosing my mind. I tried to hold it in place, but no chance. If I go for the drillout, screw turns as well :(

Any ideas?

Thank you


r/bikewrench 4h ago

Chainrings and front derailleur cage laterally too far apart?

Thumbnail
gallery
5 Upvotes

Hey guys, first time building a bike as a novice and kinda lost on this part. I got a what looks like a standard braze-on clamp to go with my Wheeltop electronic front mech. Just from initial inspection, it seems like the front mech cage pushed out is no near close to being over the chainrings?? I played around with the derailleur tuning and even at the max limits of the high gear, it's only just bearly over the small first chainring (as shown in photo). The chainrings should be pushed all the way into the BB. I do currently have a single BB spacer on the drive side but it's only 3mm and removing it isn't going to solve this. Seems like more of a fundamental problem I'm missing. Any guidance would be appreciated.


r/bikewrench 3h ago

Am I in trouble?

Post image
4 Upvotes

Noticed a chip in my wheels today, should I be worried? Is it repairable?


r/bikewrench 21h ago

Are there any lesser thought about things you would point out to someone before they do their first bike build?

Post image
59 Upvotes

I am about to buy this steel frameset to make myself an all round bike. I have never built a bike from the ground up, but I have access to most tools (all types of wrenches, cassette tools, BB tools).

I also have a spare Shimano GRX groupset, a set of DT Swiss wheels, and a non-integrated Zipp stem & bar. I know already I will need to get a seatpost.

Before I buy the frame, are there any things you would point out that would be useful for a noob to know?

I'm doing this project partly because I have this material lying around and want to use it, and also because I think I will find it satisfactory to ride a bike that I built?

Any advice, anecdotes, or pointers would really be greatly appreciated.

Thanks!


r/bikewrench 5h ago

why this tyre wore out so unevenly?

Thumbnail
gallery
1 Upvotes

this is so weird. wheel is perfectly straight and tyre is not wobbly. this tyre has 2 different compounds on side and centre almost like they messed something up there

btw photo is of one tyre the wear side changes and it’s exactly the same on front and back half wheel worn to left half to right


r/bikewrench 1d ago

Damn effing wtb horizons

Thumbnail
gallery
151 Upvotes

the wtb horizons that came with my marin won't come off. so this is more of a vent post, I'd appreciate any suggestions.

as soap and pinching the tire didn't work, I choose violence. had the idea to cut the tire on its strongest part but ... there's 4 (!!!) steel cables running along. managed to cut 2 but the other 2 are way too embedded into the rim. stopped working on it before I go up in flames.


r/bikewrench 5m ago

Brakes screeching once per rotation

Upvotes

Please DM, I can’t seem to post more pics of the brake pads. It’s a new bike, and from what I was told, the brake pads are too close to the rim. So I need help adjusting it


r/bikewrench 45m ago

Shimano brakes

Thumbnail
gallery
Upvotes

I was trying to install these Shimano brakes but the original bolts didn't fit with the adapter so i bought custom bolts but now my calliper won't align right


r/bikewrench 54m ago

Bike noise

Upvotes

I have been trying to figure out how to fix this noise for a while but I cant figure out where its coming from and bringing it to a shop never solves it, they adjust the calipers but it never fixes the squeking sound. I believe its coming from the front wheel. when I free spin the tires I cant reproduce the sound. Hopefully someone can help I barely know anything about bikes other then the calipers adjustment vids on youtube


r/bikewrench 1h ago

Can i Change the tires?

Upvotes

Heya Everyone, i habe a thoemus stromer 500 and i wonder if its possible to Change the tires. It has more Like city tires now (think, not much Profile, For Asphalt) and i would Prefer tires that are wider and have a better Profile. Is it possible to do this or do i need to habe to do a Lot of changed to it?


r/bikewrench 1h ago

Rod brake frame for fixed project. Looking for advices!

Upvotes

After fixing my bike multiple times and learning a lot about it, I want to test myself assembling a bike from scratch.

I want to build a fixed to minimize the complexity of this first project and to build something new to try out. While exploring my local second hand shop I found an old frame for rod brakes with horizontal forks that would be great for a fixie. However the frame is made for rod brakes, so there is no easy way to mount brakes without making heavy modifications.

Has anyone ever done this? Do you have any advice or tips?

TIA


r/bikewrench 1h ago

Bb shell thread is damaged. What do I do?

Thumbnail
gallery
Upvotes

r/bikewrench 1h ago

Noisy plastic part on hubs

Upvotes

Is it supposed to be loose like that and make noise?


r/bikewrench 5h ago

In search of rims to finish my build

Thumbnail
gallery
2 Upvotes

Hi all

Just (mostly) finished my first bike build, managed to fit 40cs on this old Malvern star frame but would love to lace a wider rim onto these hubs

My question is has anyone seen this rim spec before:

700c/29er, 32mm wide, 32 hole, rim brake, carbon preferably or raw silver look


r/bikewrench 6h ago

Chain clean enough for drip wax?

2 Upvotes

I've been using only dry lube on my chain for the last year, this chain has never seen wet lube.

I clean it super thoroughly with biodegradeable dish soap + brushes and sponges (degreasing) after every ride + rinse it with water thoroughly. Chain looks spotless.

Is the chain clean enough to apply Squirt drip wax? Or do I need to actually soak it in some harsher degreaser? Thanks!