Questions tagged [freehub]

The part of the rear hub which holds the casette. It employs a ratchet and turns only when you pedal. Track bicycles / fixies don't have one.

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16
votes
4answers
10k views

What freewheel mechanism designs are used in bicycles?

What are the various freehub mechanism designs that have been designed and or put into production? (doesn't need to have been made necessarily!) A good post will contain: A description of the design,...
15
votes
3answers
3k views

Why do freehub and cassette have only one position that matches?

When I'm installing cassette on my freehub, I need to make sure that the spaces align correctly. That is, there are 10 splines on the freehub and 10 corresponding splines on the cassette. My first ...
9
votes
4answers
435 views

Servicing a Vuelta XRP Disc Hub

I can't for the life of me figure out how to get the freehub body off of this hub. Everything I can find online about the Vuelta hubs says that I should be able to stick a 5mm hex key into both sides ...
7
votes
2answers
4k views

Why am I getting no power when I pedal?

Yesterday when I was biking my mountain bike on level paved path, I would pedal but get no power to the wheel. To use a car analogy, it was as if I had the clutch in and was apply gas. It seemed to ...
7
votes
3answers
1k views

(Apparent) chain slippage causes on new bike - usual culprits already eliminated

I recently purchased a new bike (~7 weeks ago). Since day one, it has had an issue with chain slippage. I initially took it back to the bike shop from which I bought it, to be told that it was likely ...
7
votes
2answers
1k views

Freehub: why are the pawls on the inside surface not the outside?

This might have an obvious answer but when I look at freehub designs, I always see the pawls on the inner member and ratchets on the outer member. Here is an example: Has anyone ever reversed that ...
6
votes
5answers
2k views

Could I replace a hub on a wheel?

I have a freewheel and I keep bending the axle, however the rim, spokes and tire are all fine, does anyone think it would be possible to unscrew the spokes, buy a new hub that has a freehub, install ...
6
votes
2answers
2k views

Flashpoint FP80 / SRAM S80 - rear hub specifications?

I'm looking for the specs of a SRAM S80 rear wheel hub. I dearly wish to replace its 9/10-speed freehub body with one that can accomodate Shimano 11-cog casettes. SRAM S80 was a 80mm-profile aero ...
6
votes
2answers
201 views

What is this Allen bolt on my novatech freehub, and what does it do?

I've been servicing the novatech freehub on my Kona cyclo-cross bike after a particularly filthy ride. When removing the freehub I noticed this tiny Allen bolt by the inner pawls of the freehub. When ...
5
votes
1answer
134 views

Is Shimano the only company with a sealed ratchet mechanism in their freehubs?

Most freehub designs have exposed rachets when the freehub cassette body and hub are disassembled. So much care must be taken to keep the mechanism clean and free from dirt an dust. Shimano's freehub ...
5
votes
2answers
152 views

What model/make are this Freewheel and Freehub?

I am in the process of overhauling my old Motobécane racing bike and I'd like to replace the freewheel, if reasonable. However, there is no indication of who made it (the bike shop couldn't help) and ...
4
votes
3answers
217 views

Old Shimano Altus Hub disassembly. Clockwise or counter clockwise?

I hope to squeeze a bit more life out of this old Shimano Altus hub and apart from having to build my own tool: Do I have to turn the inner part with the two notches clockwise or counter-clockwise? ...
4
votes
1answer
321 views

How to remove a Joytech freehub (5mm allen key version)

I've been trying to remove broken my joytech freehub (from an 11 speed felt b16) for a frustratingly long time. The model in question takes two 5mm allen keys, and is not the same as the seemingly ...
4
votes
1answer
4k views

Fix a wobbly Shimano freehub?

I have a brand new Shimano Ultegra WH-6800 rear wheel. The freehub has about 2mm of play in it. I can feel the play without the cassette installed by grabbing the freehub body and moving it. It moves ...
4
votes
2answers
834 views

What is causing an intermittent side to side wobble of the rear cogs?

I am struggling to diagnose the cause of an intermittent side to side wobble of the cogs on a rear wheel. Here's what I know: Periodically (maybe every 10-15 minutes) during a ride, I experience ...
3
votes
1answer
809 views

Freehub vs freewheel in a singlespeed?

I'd like to know what is better in terms of maintenance and reliability in the long term. I currently have a flip flop hub with a freewheel which I had to replace recently. For what I saw there were ...
3
votes
2answers
351 views

How do I remove this Ksyrium hub body?

I want to get into this hub to lubricate the bushing. Every instruction I see on the Internet says to use a 5 mm Allen and a 17 mm wrench. But there is nothing to put a 17 mm wrench on. There is the ...
3
votes
1answer
138 views

Remove freehub on this bike

I am struggling to remove a freehub from my bike. Please help me to disassemble the hub as it is stuck. When I stop pedaling the cassette keeps turning, to the point where it pulls the chain and ...
3
votes
2answers
672 views

Freehub body wiggles

This is a OEM wheel from a 2014 Salsa El Mariachi Single Speed, called a "Salsa 2, Singlespeed" hub, which I believe is made by Formula. The freehub body "wiggles" (the thing that my fingers are ...
3
votes
1answer
142 views

Rear wheel not spinning when the skewer is locked in

Can someone please tell me what is causing my rear wheel to "stiff up" when pedaling. I recently cleaned the rear hub because at first it was causing the wheel to "stiff up" when pedaling. At first I ...
3
votes
2answers
519 views

Replacing roller-clutch freehub with ratchet type

I live in Finland, and as such the weather right now is pretty cold. Since I rely on my bike for shopping in a rural area, the frequent and complete loss of drive I now suffer at below-freezing ...
3
votes
3answers
102 views

Cannot remove freehub body

I have searched through Stack Exchange and found another question about a stuck freehub, but I am confused about which direction to turn the 12mm hex wrench to loosen the freehub. It is an 8-speed ...
3
votes
1answer
87 views

Rear wheel replacement: freewheel -> freehub and cog size changes

I've replaced the rear wheel on my bicycle. The new wheel is different in two respects: I got a 8-speed freehub because 7-speed freewheel hubs seem to be difficult to find these days. I had a 7-speed ...
3
votes
1answer
226 views

Converting to 1x11 SRAM drivetrain with 8/9/10-speed HG Freehub

I currently have a 3x9 Shimano drivetrain, and I'd like to replace the current Shimano 9-speed rear derailleur/shifter/cassette and front derailleur/3 chainrings with the SRAM PG-1170 11-32T cassette, ...
2
votes
3answers
2k views

What tool do I need to remove this Joytech freehub?

I have tried 10mm allen: too small, spins freely, with very little grip. Hub brand: Joytech On the outer side it has 9 ball bearings. Video showing right/drive side: ...
2
votes
1answer
1k views

Is there a difference of spacing between cogs on a 7 speed cassette vs a 8 speed cassette?

Is there a difference of spacing between cogs on a 7 speed cassette vs a 8 speed cassette? When I got a new wheel (upgrade from freewheel hub), I tried to get a 7 speed cassette (SRAM) for it, but ...
2
votes
3answers
1k views

Remove bearing cartridge on a Formula RX-142 hub

I am trying to replace the free hub side bearing cartridge on this Formula RX-142 rear hub. It came stock on my 2018 Fuji Jari 1.7 and was not available after market and I can’t get docs on it. Do I ...
2
votes
2answers
622 views

How can a Mavic freehub stop working after cleaning?

I have a Mavic Aksium Race rear wheel. The freehub was working and felt gunky. I opened it to clean it (it was dry with some gunk and a bit of rust stains) and reassembled after lubricating with ...
2
votes
1answer
90 views

What is this cogset body?

I have some backlash (free movement) in my body of cogset, so I try to dissemble my cogset to discover this weird body: I'm trying to find a new one but I don't know how to call it. Any idea how it ...
2
votes
2answers
117 views

Freehub body will not undo

Trying to take the freehub body off my bike. The bike is a fairly low end Raleigh Shimano Tourney set up. I got a 12mm hex, inserted it into the hex groove on the freehub side and tried to turn it ...
2
votes
2answers
2k views

Cassette jerks chain forward intermittently

I have a 3 year old road bike with Shimano Ultegra 11 speed freehub CX-75 and cassette CS-6800. Recently I started hearing clunking noise from the drivetrain during freewheeling. It appears that the ...
2
votes
2answers
2k views

Oil/lube for Shimano freehubs

After an extremely muddy and wet MTB race (riding in puddles covering the brake rotors) I need to do a full bike overhaul. The only thing I don't know is what lube to use after degreasing the ...
2
votes
2answers
961 views

I cleaned my cassette and changed my chain, now my freehub is slipping. What are the possible causes? [duplicate]

I removed my cassette, cleaned it and put a new chain on my mountain bike. All seemed to go well and went back together nicely. However when I took it out for a ride the free hub seems to be slipping ...
2
votes
1answer
707 views

What caused play in my freehub?

I was getting my road bike out earlier and heard a clunking sound when I dropped the back wheel. I repacked the bearings in it ~200 miles ago, and the wobble felt like bearing play. However when I ...
2
votes
1answer
471 views

upgrade from MF-TZ21 to 7 Speed cassette freehub

I'm trying to save costs so I want to upgrade to 7 speed 11-28 Cassette to keep the same shifters, dealer says I need a new Freehub, new 7 Speed Cassette, new chain AND NEW DISC BRAKES, why do I need ...
2
votes
1answer
110 views

Should a cross-threaded (but functional) freehub body be considered safe?

I cross-threaded my cassette lock-ring on a pair of Fulcrum racing 4 DBs (aluminum threads AFAIK). Upon removing the cassette it looked like the top of the threads were slightly damaged, but I was ...
2
votes
2answers
190 views

Swap Shimano/SRAM freehub for Campagnolo

Through my work I am able to get a set of freewheels pretty cheap (less than 100€). I know they are not super special but they are still an upgrade to my current ones. Here are the wheels: https://...
2
votes
1answer
304 views

Can I replace a Shimano RM30 8-speed freehub with an RM33 without any fiddling?

I have a Trek 4300 mountain bike with a Shimano RM30 8-speed freehub that's slipping badly. When I search for a replacement, some places seem to interchangeably suggest the RM33, but I was hoping ...
2
votes
1answer
276 views

How to disassemble free hub shell?

I need to replace the free hub shell that is on my wheel with one that will work with an 11-speed Dura-Ace cassette. The current one is for Campagnolo. I don't want to take the whole wheel apart, I ...
2
votes
1answer
1k views

Is it usual for a freehub to have play? [duplicate]

I have a new rear wheel (Shimano Ultegra WH-6800) and the freehub has about 1mm-2mm of play in it. When the cassette is installed and the wheel is on the bike I'm getting a lot of wobble which is ...
2
votes
1answer
927 views

Rear wheel doesn't turn with cassette

I just got a used mountain bike and on my first trip my rear wheel stopped turning with the cassette. When I pedal it turns the cassette and the gears still change smoothly but it doesnt turn the rear ...
1
vote
2answers
783 views

Shimano FH-6800 rebuild or replace?

I just bought a used 2016 Specialized Diverge Pro. The guy that sold it to me told me that he'd recommend replacing the bearings in the rear hub. I believe the free hub is an FH-6800 (Ultegra). Any ...
1
vote
4answers
117 views

Swap 7-speed for 9-speed

I have a Giant Defy 9-speed road bike, and a thief stole the front wheel. I found a good deal on a set of used Bontrager (Edit: Mavic Aksium) wheels, so I bought them as a set. I want to swap both ...
1
vote
2answers
130 views

Hub sticking - friction

Bike I got used and happy with the price for frame alone but I don't know the history. Kris King hub with significant drag. With cassette off and just a rim if spin it hard I get 5 revolutions. I ...
1
vote
1answer
212 views

Freehub Seal Orientation “Axis Sport Disc”

I've serviced my freehub, and on putting it back together am unsure of the correct orientation of the seal between the hub body and the freehub. I have a 2018 Specialized Diverge E5 Sport, with a ...
1
vote
1answer
504 views

9 Speed Cassette does not go all the way in on the free-hub body

Wheel: Shimano WH-R500 Cassette: Shimano CS-HG400-9 9 Speed I can put the cassette on the free-hub body but the chain will stuck on the highest gear. The cassette seems to not go all the way in on ...
1
vote
1answer
60 views

What freehub do I need?

The bearings in my freehub are starting to go and I'd like to replace the part. Sadly I have no idea of the part I need to replace it with and cannot find anything specific. My bike is a Merida 140 ...
1
vote
2answers
76 views

Replacement freehub

I am wanting to replace my existing free-hub, it came with the Giant SL1 disc centre lock wheel I bought and I assume it is a Shimano. I am running Tiagra gears and a 10 speed cassette. Can i just ...
1
vote
2answers
209 views

Identifying replacement freehub

I’ve been tasked to source a replacement freehub, any ideas what this type would be? Might be obvious forgive my ignorance! Forgot to mention, it’s from a Marin bike. That’s all I know so far
1
vote
2answers
344 views

Specialized tri-spoke rear wheel free hub replacement?

I'm looking to replace the free hub on my Specialized tri-spoke rear wheel. Can't seem to find a model number,and would love to put an 11-speed free hub. Hope for some help?