r/bikewrench • • 10m ago

5 speed chain size?

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• Upvotes

What size of chain do I need for an old mountain bike with a 5 speed cassette? I tried throwing on a 6-8 speed chain and it got sucked into the cassette

Can I use a 3/16 singlespeed chain from walmart?


r/bikewrench • • 39m ago

14mm from the top of the expanding spider to the top of the handlebar. Too much?

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• Upvotes

r/bikewrench • • 1h ago

Tips for a less weird look

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I’m reviving my old 2016 ghost mtb. It’s not a cool 90s mtb but it has the 26 inch wheels. I wanted to switch to a rigid fork, chose steel for a few reasons and now realised (a bit late tbh) that it looks a bit strange, just for the proportions. Any tips (like cool low front racks or a sleek mudguard or smth?) to hide this (also maybe i should paint the front black)
Still pretty happy i found a cheap fork that fits.


r/bikewrench • • 1h ago

Shimano XT shifter adapter for Shimano I-Spec EV brake clamp?

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• Upvotes

I currently have a SRAM GX shifter connected to a Shimano I-Spec EV brake clamp using a WolfTooth MM-ISEV adapter as shown in photo #1.

I want to install an XT shifter & derailleur to my I-Spec EV brake clamp. However, new XT shifters come with an individual bar clamp as shown in photo #2.

What clamp adapter do I need to connect the new XT shifter to the I-Spec EV brake clamp?

I searched the internet but it isn’t very obvious from all the options out there and multiple Shimano standards.

Thanks


r/bikewrench • • 2h ago

Seized seatpost help please

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2 Upvotes

Got this bike for free and stripped it down to clean up. Of course the last thing off was the seat post and the aluminum and steel are fused together. Any tips appreciated!


r/bikewrench • • 2h ago

Cranks spin oddly backwards after clothing got caught in chain

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1 Upvotes

My girlfriend's oversized trousers got caught in the bike chain while riding. Since then, the bike pedals normally when moving forward, but when I spin the cranks backwards, they behave as shown in the video.I'm trying to work out what might have been damaged and how to fix it. I've already checked the rear derailleur hanger and it appears to be straight.
Has anyone experienced something similar or have any ideas on what could be causing this?

Thanks in advance for any advice.


r/bikewrench • • 3h ago

Stem to high?

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0 Upvotes

Should be fine right? Or should i lower it a bit?


r/bikewrench • • 4h ago

GX Eagle AXS / Shimano Cassette

1 Upvotes

Hi i'm running this setup on my ebikes, works perfectly but i feel like the shimano chain is "rubbing" against the sram pulleys on the derailler, do you guys know which pulleys should i buy to fix this? thanks


r/bikewrench • • 5h ago

Brake lever reach

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3 Upvotes

Hey all,

I recently bought a bike and I'm trying to get into it.
I find when I pull the brake levers there is too much travel.
I messed around with the screw pictured (which I shouldn't have) to see if it adjusted the reach.
My two questions are:
Have I screwed anything up by turning the screw pictured?
Where is the actual reach adjustment screw?

It's Shimano Cues if that helps.

I'd really appreciate any advice.


r/bikewrench • • 5h ago

Di2 Battery issues

1 Upvotes

I've been having discharge issues with my 105 Di2 and was told that if you set the RD limit screws wrong the RD constantly pushes on them and this drains the battery.

I've now set the screws so that the RD sits by itself in the gear without hitting the screw barrier (adjusted so that it sat in gear then a little extra until the RD didn't move). Is this now "set correctly" and will it fix the discharge issue?

Thanks


r/bikewrench • • 7h ago

Slam the stem

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0 Upvotes

How the hell do I slam the bars/stem on the Giant Advanced Revolt 2? Do I need weird spacers that go on top?


r/bikewrench • • 7h ago

What is wrong with this shifter?

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3 Upvotes

I haven’t driven mechanical bike since years (di2 instead), so I’m not 100% sure but something seems off with this shifter.
My initial thoughts:

Pretty sure a spring is too loose, missing or stuck.

Shifting with the small lever is somehow strange, there is too much “play”, nothing happens until you really push it to its end position.

Can anybody confirm both, and how I could potentially repair this?

It’s an Ultegra 6800 groupset, hydraulic brakes.


r/bikewrench • • 10h ago

What crankset/spindle does this attach to ?

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0 Upvotes

I found this on Amazon. What does crankset/spindle does it attach to ?


r/bikewrench • • 10h ago

Solved Wtf is happening to my drive train

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10 Upvotes

r/bikewrench • • 13h ago

Can I use Shimano Hollowtech II cranks with an FSA MegaExo BB-8000/6000 bottom bracket?

1 Upvotes

I’m looking to replace the 172.5 mm FSA Gossamer crankset on my Scott Plasma 30 with a 165 mm Shimano 105 or Tiagra crankset.
My current setup:
Crankset: FSA Gossamer MegaExo
Bottom bracket: FSA MegaExo BB-8000/6000
Chainrings: 50/34T
Drivetrain: Shimano 10-speed
Front derailleur: Shimano 105
From what I understand, both FSA MegaExo and Shimano Hollowtech II use nominally 24 mm spindles, but I’ve read that there can be differences in bearing dimensions and compatibility.
My questions:
Can I install Shimano Hollowtech II cranks directly into my existing FSA MegaExo BB-8000/6000?
Has anyone successfully done this combination without issues?
If they’re incompatible, would I need to replace the entire bottom bracket, or is there another solution?
I’m trying to keep costs down while switching to shorter cranks for a more comfortable aero position.
Thanks for any advice!


r/bikewrench • • 14h ago

Help with handlebars

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4 Upvotes

Older 80's Fiji S12 S LTD, trying to get the bars off but can't figure out which direction to spin this Allen bolt that sits on the inside of where the shifter lever sits. On one side the whole bolt/housing just spins, on the other side I have to apply serious torque and it's not bugding. Can't find anything online.


r/bikewrench • • 14h ago

Clicking sound when I pedal

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0 Upvotes

I have my bike on a trainer (wheels and tires are worn out, probably on the trainer until spring) and I hear this clicking sound when I pedal. It only happens when I’m on the bike. No sound when I spin with my hands. Is it a loose bolt? Or some other issue. It’s pretty annoying if this continues the whole winter.


r/bikewrench • • 14h ago

Shimano Di2 Dead After Trying Update

2 Upvotes

I bought a 2016 Orbea with Ultegra Di2. It has the junction box under the stem and a seat post battery. It’s worked great since I got it.

Well then I discovered if I upgraded my battery, I’d be able to install firmware updates that would give me shift modes, etc.

So I bought the updated battery and the in-line Bluetooth module to be able to connect to my phone.

I installed those items today and got my phone connected, no problem. The Shimano app showed that all my components were up to date, but showed a firmware update for the BT unit I just installed.

I let that update run, but when I checked my phone after a bit it said “update failed” and my phone was disconnected from the bike. I also couldn’t get any lights on the junction box to turn on when I pressed the button, so I figured the battery died mid-update.

I removed the BT module from the system and just connected everything back like normal. I let it charge for a couple hours and the light on the charger went off, indicating the battery was full.

I still can’t get any lights to turn on on the junction box and the shifters do nothing. Like the system is dead. Attempted a reset by unplugging the battery for 10 mins. Still nothing after plugging back in.

I have no experience with these systems, I hope it’s not totally dead. Any advice?

Thanks!


r/bikewrench • • 14h ago

Squeaking sound when I pedal

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1 Upvotes

My Trek Domane AL5 Gen 4 has been making this squeaking noise when I pedal. If I'm coasting, it doesn't make the noise. Doesn't do it all the time, so it's been hard to pinpoint where it's coming from exactly. Any help or suggestions are appreciated.


r/bikewrench • • 15h ago

2022 Giant Propel Advanced Pro Headset (stupid design)

1 Upvotes

Replacing headset bearings on my 2022 Giant Propel Advanced Pro. In order to replace the bottom bearing I have to remove the hydraulic brake line. Do I have to cut the line or can I get it out of the fork with nut and olive in place?


r/bikewrench • • 15h ago

Rear hub slippage.

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13 Upvotes

My dt swiss 350s are slipping. I have tried everything and they keep sliping, only under sharp increases of torque like a race start though. I only let them slip 5 times before i quit trying because i would prefer not to ruin them. Im using dt special grease, i lubed the sides of tbe rachet, no they're not conical springs. How do i fix this?


r/bikewrench • • 16h ago

Put a bacon strip in a few days ago, seems to be holding air fine but looks to be some sealant leaking out a bit. Is this normal? Should I put another strip in right beside it?

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1 Upvotes

r/bikewrench • • 16h ago

Grease for a mid bottom bracket

1 Upvotes

So I have been using either Park grease or duemonde tech mr grease ,But I am trying to figure out a better grease to use .I got some mystik multipurpose grease but I am not sure if that will be good enough .The park grease definately feels thin to me .


r/bikewrench • • 16h ago

Is this just called a spacer?

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1 Upvotes

Giant trance 292x
It goes between the ball bearings on rocker and the rear frame


r/bikewrench • • 17h ago

Orbea Alma H20 - rear derailleur issue

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1 Upvotes

Do you have any idea what can cause this?

If I shift down once from the initial position the chain drops two gears, makes a clicking sound and starts jumping up a gear. Following this, the shifter doesn't give a "click" feedback anymore when I try to go into the last gear.

I tried to adjust the indexing, but if i tighten it the chain just won't go into the last gear at all.

Bike (Orbea Alma H20) is bought new, and I rode it for a total of about 100 km. I crashed twice, both times at low speed, and I don't think the derailleur got hit.