Questions tagged [freewheel]

The freewheel is a ratcheting mechanism, that coupled with a set of gears, is that threaded onto the rear hub of a bike. The freewheel allows the rear wheel to engage and move when the pedals are spun forward, but coast freely when the pedals are stationary or spun backwards.

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43
votes
10answers
87k views

Why are higher-end freewheels so much louder when coasting?

I tend to ride relatively modest gear (Tiagra/Ultegra), but when I'm riding near higher-end bikes, I sometimes notice that the clicking sound that comes from their cassette/free-wheel while coasting ...
31
votes
2answers
13k views

Why does pedalling backwards not move my bike backwards?

On the Mountain bike I have, pedalling backwards moves the chain but doesn't drive the wheels of the bike backwards like you would expect it to. Why is this?
16
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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,...
14
votes
5answers
7k views

Do silent freewheels exist?

I have only just noticed that my bike dosen't seem to make a lot of noise when free wheeling, in fact it's pretty much silent. Is this down to the fact that I have been putting off a major clean?, is ...
13
votes
10answers
19k views

Is there such thing as a freewheel that doesn't click?

The clicking sound of the freewheel on my singlespeed when it's coasting is annoying for me, so I flipped over my back wheel and rode fixed for a few months in blissful silence. But having to pedal ...
10
votes
3answers
2k views

When to replace wheel bearings

I just ripped apart my mom's mountain bike's rear hub. One of the bearings was incredibly rough, so I replaced it, and the other one was smooth, but didn't turn very easily. Since I didn't have a ...
9
votes
3answers
5k views

How do I clean the inside of a freehub?

I didn't know any better and I let degreaser drip into the freewheel body of my Shimano FH-RM65. Now it makes a terrible retching noise when it rotates. How do I clean the inside of this thing? I'm ...
8
votes
3answers
68k views

What is the difference between a freewheel and a hub?

I think these are both just types of cassettes, one all the rings come apart, and the other it's just one big piece all welded together. Can someone please tell me what the difference is?
8
votes
5answers
815 views

What can I do to keep my rear derailler in good condition when commuting in the snow?

In the winter, it seems that whatever I do, my rear derailleur stops functioning after few weeks of commuting in light snow. Ice always gets in there somehow, and the chain refuses to move the wheel, ...
8
votes
1answer
272 views

Why do deraillers require a freewheel?

I've seen fixies with internal hubs, but a non-freewheeling rear wheel with deraillers seems to be unrepresented: | Freewheel? | Derailler? | Yes | No | ...
7
votes
4answers
1k views

What's the point in a freewheel/cassette with incrementally sized rings?

Pictured is a freewheel with 15, 16, 17, 18, 19, and 20 tooth sprockets. What I don't understand is why such small increments are worthwhile. Surely the point of having gears is the variance that they ...
7
votes
1answer
1k views

Is changing wheel necessary to use a freewheel with different number of gears?

Approx. 3 weeks ago I found an abandoned frame (including handlebars, fork, brakes, pedals and shifting gears attached to it). I decided to use it to build a new bicycle since only recently I've ...
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
6answers
5k views

Reverse Gear in Bicycles

For an ordinary bicycle (neither fixed gear nor capable of changing any gears). Is it possible to modify it to have a reverse gear on it? (i.e. reverse pedaling causes the bicycle to go backward) (...
6
votes
2answers
91k views

When I pedal the rear wheel is not turning

I have a very old bike. It used to work perfectly, but just recently it happened that when I pedal the rear wheel is not turning. Just for notice I pedal in the correct direction, brakes are not ...
6
votes
2answers
4k views

Tightening rear quick release stops rear wheel

I have a medium sized Trek Mountain Track/Antelope with a seven speed freewheel. When I tighten the rear quick release, I have to carefully back off on the tightness so that the wheel will actually ...
6
votes
5answers
38k views

What should I use to lubricate a freehub?

I've noticed my freehub has gotten quite a bit louder over the last few months. Several people have recommended that I lubricate the freewheel by tipping the bike on its side and dripping lubricant ...
6
votes
3answers
344 views

Are all ready-made wheels sold “cassette compatible” only?

I will have to change my wheels on my old trusty late-80s Peugeot (PS28) soon. The rear wheel is mounted with a freewheel-type 6-speed hub (not cassette). I was wondering if all ready-made wheels ...
6
votes
3answers
42k views

Advantages / disadvantages of freecoaster and cassette hubs

I've been reading a lot over the past few days about BMX, and last night I watched a few videos like this one. I have been seeing the words "freecoaster" and "cassette" around a lot, and I was curious ...
5
votes
4answers
1k views

Rusty chain and back cassette – Replace or repair?

Reference of the chain: KMC Z51 Reference back freewheel: Shimano TZ21 14-28 Teeth 7 Speed Reference of the bike: BTWIN Rockrider 340 I recently acquired a second-hand bike and decided to repair it: ...
5
votes
4answers
2k views

Old freewheel removal

I have an old rear wheel - I think its from a Raleigh Arena roadbike from the late 70s or early 80s. There are broken spokes that require the sprockets removed to access. I've done this plenty of ...
5
votes
1answer
5k views

How can I tell if my bike has a freewheel or a cassette?

I bought a Frankenbike off Craigslist. It's a Specialized Rockhopper of unknown year, converted to a commuter, with shocks up front and V-brakes. I love this weird little bike and want to put a ...
5
votes
1answer
996 views

Can we turn a fixie bike into a freewheeler?

I'm new to the fixie world. I'm planning to buy a fixie bike though, but to start right away would be difficult especially when I'm pedaling down hill. Is it possible to change the fixie bike into the ...
5
votes
1answer
12k views

How many freewheel thread sizes are there?

I'm buying new freewheel and noticed that not every freewheel can be screwed onto my hub because they have different thread sizes. For example: I've found the following thread size specifications: ...
5
votes
3answers
21k views

What tool is needed to remove a Shimano HG-50 freewheel?

What tool is needed to remove a Shimano HG-50 freewheel from the wheel hub? It looks like a 12mm or 13mm Allen key. Will this do it or is there some detail I have missed?
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 ...
5
votes
1answer
2k views

5 speed cassette on 8 speed hub

I just picked up a cheap wheelset to replace the wheels on a vintage bike. The old bike had a 5 speed freewheel (I think. The model printed on it is shimano-ug). The new rear hub is a shimano fh-rm30 ...
5
votes
3answers
515 views

Shaky Freewheel

I posted a question some time ago about vibrations in the frame of my road bike (a 1973 Sekine). Recently, I determined that the rear wheel is sliding back and forth across the axle, with about 0.5cm ...
5
votes
2answers
568 views

Help me understand my 8-speed uniglide compatibility issue

I have a Dura Ace 8-speed uniglide rear hub/freewheel marked 'Integrated 8 SIS' and an 8 speed uniglide 14-21T cassette. Two issues - the first being that the smallest cog needs to be a special 32mm ...
5
votes
4answers
3k views

Why is my chain riding up and skipping teeth on the freewheel?

Due to a number of reasons, I would like to keep my freewheel at all costs (It's a Sachs freewheel, the bike has all sorts of more 'vintage' components, and they're hard to come by). From reading all ...
4
votes
2answers
7k views

What do I need to know when replacing my cassette?

I'm looking to replace the cassette on my bike with a smaller version, as I find I'm only ever using the top ring of my chainring (except once recently during rain-ageddon). What do I need to know ...
4
votes
4answers
2k views

Chain skipping on new freewheel and chain setup - What went wrong?

BACKGROUND NOTE: The bike is a 1992 Univega MTB that originally came with 6-speed SIS with a triple chainring. I removed the SIS shifter when it broke, and went with a friction shifter. The bike is ...
4
votes
2answers
2k views

Mounting a 7-Speed Cassette on an 8/9 speed hub

I asked an earlier question regarding putting modern road wheels on my old steel frame. After clarifying a few things the main issue to me is the number of gears on the freehub. (The freehub I'm ...
4
votes
2answers
4k views

Freewheel not working properly

I have an older Trek Mtn bike with Shimano components. Just today the pedal started spinning without turning the wheel. I can pedal forward and backwards and occasionally it will start turning the ...
4
votes
1answer
2k views

Should cassette “wiggle”

Recently My freehub broke and so I removed the cassette to replace the freehub and noticed, whilst off the bike, 4 of the remaining bolted together 8 sprockets wiggled (4 wiggled together but ...
4
votes
2answers
18k views

How should I lubricate my Shimano freewheel?

I have a Shimano freewheel (MX-30) that came with my bike from new. Unfortunately the internals got all gunked up and it stopped working (never engaged and became free both ways). I have bought and ...
4
votes
2answers
7k views

How to take apart this rear BMX hub?

As shown in the photo, what tool do I need to take this rear hub apart? I assume I need a tool which will fit in the 4 notches. The problem I am trying to fix is that if you pedal, the rear cog spins ...
4
votes
2answers
8k views

freewheel removal tool for Shimano MF TZ21

I have a Rockrider 5.1 cycle with a Shimano MFTZ21 freewheel. In order to remove the freewheel, I purchased the Btwin tool kit. But the removal tool provided in the kit does not fit on my freewheel. ...
4
votes
1answer
593 views

Is it a good idea to switch to hub gear?

I have a Firefox Roadrunner Pro. I wanted to know if it was a good idea to install an internal hub gear on it. I want to install it to reduce dust accumulation and oiling and to simplify the wheel-...
4
votes
1answer
7k views

How many ball bearings inside shimano MF-HG20 freewheel top and bottom?

help me fix the bearings in my freewheel. I need to know the number of ball bearings top and bottom in my shimano mf-hg20 freewheel, and what size are they?
3
votes
3answers
4k views

Rear index shifting not staying in middle gears

I have replaced a chain (SRAM PC 830) and 7 speed freewheel (Shimano MF-HG37) on the back of my daily commuter bike about 300 miles/ 3 weeks ago with the same models. The old parts lasted me 4000 ...
3
votes
1answer
741 views

Is this an unsuitable cassette lockring tool?

I can't get my lockring tool to fit my cassette's lockring. The tool is about 1mm i diameter bigger than the lockring, although they have "hills and valleys" that line up. Here's the lockring: Here'...
3
votes
1answer
811 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
2k views

Best option to upgrade 7-speed bike to higher gears

I have recently bought Giant Escape 3 hybrid bike that came with: Shimano FC-TY501 28/38/48 chainset 8/7/6-speed compatible Shimano Tourney RD-TY500 7/6-speed rear derailleur Shimano MF-TZ31 14-34T "...
3
votes
1answer
490 views

Freewheel in vinegar

I'm renovating an older bike. I took the 6 speed freewheel (Shimano mf-tz20) off because it was rusty, disassembled, chucked the parts in vinegar overnight. The rust came off, but so did the goldish ...
3
votes
1answer
379 views

sun ez3 trike gearing

I have sun ez3 trike,it has rear freewheel with the largest being 28 teeth,can I put a mega range with 34 teeth on it,and do I have to change the deraileur.Objective to make hills easier.
3
votes
2answers
25k views

How did my rear freewheel become incredibly tight overnight?

I got a flat yesterday morning after a normal ride, walked my bike inside the house and propped it upside-down (like this) overnight. This morning, I changed the flat and put on some brand new tires ...
3
votes
2answers
9k views

Options for replacing a 7 speed Shimano cassette / chain

I would like to replace my 7 speed HG70 cassette and chain. My problem is that it is increasingly difficult to find quality parts for 7 speed system. My bike is a Trek 970 from 1993, originally with ...
3
votes
1answer
458 views

Rear wheel not moving when axle nuts tightened

I have a racing bike with the wheels secured by axle nuts. For the rear wheel, when I secure the nuts to finger tight the wheel turns fine, but when I tighten them properly the wheel is stuck and will ...
3
votes
1answer
34 views

Freewheel to cassette Conversion 2016 Windsor Wellington 2.0

I am a fit but heavy rider. I am looking to change out my stock wheel set on my Windsor Wellington 2.0 (Bikes Direct.com) to a Veulta HD 36 700c spoke wheelset. I'm just wondering and hoping my ...