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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68 views

How to unscrew freewheel sprockets with 9 broken spokes

A friend of mine has this problem. I haven't seen the wheel, but I suppose that the broken spokes are in one "area". It's a 27 inch wheel. Is there any tool that can hold hub tight enough to use a ...
3
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1answer
61 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 ...
5
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0answers
113 views

Is changing wheel necessary if freewheel hub with a different speed then previous is attached?

Approx. 3 weeks ago I have found an abandoned frame (including steering wheel, fork, brakes, pedals and shifting gears attached to it). I decided to use it to build a new bicycle since only recently I'...
0
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1answer
24 views

Can a 7 speed torpedo cable index a modern day 7 speed freewheel?

I have an old cable from a 7 speed Torpedo internal hub and am wondering if it will properly index a modern day 7 speed freewheel or if it is way off. Is there an easy way to check this? Just ...
6
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4answers
281 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) (...
3
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1answer
81 views

Freewheel not engaging when temperature below about -20c/-4f. What is freezing?

Is it moisture/slush in the freewheel that is not evaporating because I have to keep the bike outside all winter? Then it might freeze when the temperature goes low enough. How long would it take to ...
3
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4answers
271 views

Tyre rubbing against frame

Bicycle : Fixie, it came with fixed gear and freewheel, I use the freewheel cog. Today, after a tire and tube replacement it now rubs on the frame. The new tire is a little bit bigger but this ...
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2answers
56 views

29" Ascension mountain bike by Schwinn [duplicate]

My freewheel stopped working. I can still pedal forward, but not backward. What's wrong with it?
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2answers
127 views

Using only 7 speeds of an 8 speed freewheel is ok?

I currently have a 7 speed Shimano RD (rear derailleur) that is working perfectly with the stock 7 speed freewheel which is 14-28. Shimano has a MegaRange 7 speed freewheel that is 14-34 but the ...
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2answers
48 views

freewheel stress and possible difficult removal with super underdrive gear?

I tried to research this online but didn't see any examples of this exact concern, which is if I gear down a very cheap mountain bike that has a 7 speed freewheel, do I run the risk of creating so ...
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1answer
95 views

More than 7 speeds on a freewheel? Ok for someone that rides moderately?

I am contemplating going from my 7 speed freewheel to an 8 speed because I want to go from a 14-28 7 speed to a MegaRange 14-34. Problem is my RD will not handle the 34 so if I have to buy a new one ...
2
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1answer
73 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 ...
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2answers
89 views

Where can I find a compact/ultra 7 speed freewheel?

Does anyone still make these? I'm aware that I could coldset my frame for a wider spacing, but I'm interested to know if it's still possible to buy a compact freewheel (apart from via e-bay or ...
3
votes
1answer
333 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 ...
3
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2answers
192 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 ...
2
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0answers
65 views

Can you identify this Sachs hub?

I recently picked this up along with a couple of old wheels. I don't know it's age or history. I've only got as far as identifying it as a Sachs. There are no other markings apart from the logo ...
1
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1answer
255 views

Is Sram PG850 cassette a substitute for Shimano TZ31 freewheel?

I need your advice. I have a Giant Escape 2014 UK model bike and it's time to change the chain and the original cassette/freewheel, which are worn out. My question is, if I get this Sram PG850 8-...
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1answer
193 views

How to fix a clanking rear wheel/flywheel

On my single speed--a POS Bikes Direct bike--the rear wheel makes a clunking noise every time I pedal. I think it is coming from the freewheel and it's basically a CLINK! CLONK! noise that is driving ...
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2answers
2k views

How can I fix my back wheel's wobbling?

On my single speed bike--a POS J Fixie Cafe CF from BikesDirect--has an issue with its back wheel. The wheel wobbles 1cm back and forth when pulled/pushed from side to side. The freewheel has been ...
1
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1answer
85 views

Replace freewheel with freehub?

I have a Motobecane Super Mirage that I bought in 1977. I have another bike for regular use, and I've decided to completely rebuild the older one. I determined today that the freewheel teeth are worn ...
2
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1answer
178 views

Finding a single speed kit for an old campagnolo from 1997 with screw on freehub

I have an old Campagnolo from 1997 that I want to turn into an single speed. My problem is finding a kit that will fit the freehub. The outer diameter of this freehub including teeth is 34 mm, but ...
3
votes
1answer
250 views

Freewheel sprocket locking up

I was just out riding my bike. Its nothing fancy, just a €300 single-speed with with a flip-flop hub. I usually ride the freewheel side. Today it made some weird noises and decided to lock up / be a ...
1
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1answer
147 views

Maillard Freewheel refurbishing

I have a Maillard freewheel, big cog stamped 10 - 84, which i have taken apart, cleaned, lubed, and reassembled following the excellent youtube by RJ the bike guy . i ...
2
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1answer
159 views

Can anyone identify this freewheel type?

When googling the types it seemed to most closely match a Atom/Regina but it has 25 24 teeth and is about 3.5cm across. It's from a 1980s Raleigh road bike. But the bike has had a lot of work done to ...
3
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3answers
307 views

What causes frames to break at the (rear) dropouts?

The drive-side dropout and rear axle have broken twice. It's an old-style freewheel, not a freehub+cassette. (I weigh around 100kg, and ride a lot, and have been touring on hilly, gravel roads, with ...
1
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2answers
288 views

QR vs solid axle for freewheel hub

I've heard a lot of folks complaining about freewheel hubs getting bent axles. I have a rigid BSO with a solid rear axle that I occasionally pound on local trails. I've never gotten a bent axle. ...
0
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2answers
136 views

I have a Schwinn Tempo which has a 6 speed freewheel

I'd like to replace my rear wheel because it isn't able to be fixed to be made true once again. The bike is an older Schwinn Tempo, the rear wheelset has a 6 speed freewheel. Or so that's what the guy ...
0
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1answer
384 views

Can i fit a 6 speed wheel onto a 5 speed bike?

I have a 5-speed bike with a buckled back wheel. I have found one on the internet cheap, but it is a 6-speed wheel. Will it fit my bike? Will there be any adaptations needed to the bike to use this ...
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2answers
340 views

Which freewheel remover tool to use on vintage Columbia bike?

I picked up what looks to be a late 80's Columbia 'USA Racing' Women's city bike on Craigslist recently. It needs a new 5 speed freewheel, but I can't seem to figure out which remover tool to use. ...
0
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2answers
872 views

Freewheel: 8-speed to replace 6-speed

This is for the Freewheel (Not Cassette Freehub) swapping problem. I would like to know if it is feasible, regarding the axle breakage. Assuming that I have: Good clearance and spacing for ...
0
votes
2answers
155 views

Axle flex under load normal for freewheel hub?

When using a freewheel'd hub is it normal for the drive side of the axle to flex a little bit? I replaced the kickstand on my bike and the new one sits closer to the rear tire with about 2 mm ...
0
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2answers
359 views

Trying to build first fixie?

So this is the first fixie bike I would have owned. I am unsure if I want a freewheel one or not so I won't have to constantly pedal. But I was wondering or seeking help for how I could build one by ...
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2answers
1k views

How to recognise a 6-speed freewheel compatible hub?

I need to change the freewheel and the hub on my road bike and have been looking for a suitable replacement. I wish to keep my rim so I will rebuild the wheel. Also, I want to stay with a 6 speed ...
3
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3answers
2k 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 ...
2
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3answers
241 views

29" freewheel ruined (slipping)

Some time ago I gave a 29" bike to a person for a ride. Someway he ruined the freewheel (it had a shimano freewheel) - the 2 smallest cogs were badly slipping. Now I put another freewheel (also ...
4
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1answer
1k 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 ...
3
votes
2answers
4k 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. ...
7
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4answers
568 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 ...
2
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2answers
190 views

Changing from 5 to 6 cog freewheel on 1986 Stumpjumper-Sport

Refining a prior posted question. 15 speed 1986 Specialized Stumpjumper-Sport has original 5 cog freewheel, 14-30. Original Analog shifters. Biggest cog needs replacement. Individual cogs are no ...
1
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3answers
104 views

1986 Stumpjumper Sport Cog Replacement

Original Shimano Deore components all around. Shimano MF Z012 5-cog freewheel. Biggest cog is 30 teeth is worn out, chain skips, and that cog needs to be replaced. Rest of cogs are ok. Are ...
5
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1answer
2k 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 ...
4
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1answer
4k 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: ...
1
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3answers
1k views

Theoretical question about double drivetrain (both-sides drive)

If one were to take a single-speed flip-flop hub, and fit two identical freewheels, and couple them to two identical chainrings (i.e. two drive-side cranks, one on each side of the bike), you would ...
0
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1answer
192 views

Friction occurs in BMX Freewheel

I've just found out where friction occurs in my BMX. When I take chain off the Outer Part and spin the rear wheel the wheel will spin for several minutes but when the Outer Part can't rotate with the ...
1
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3answers
410 views

Chain skipping with new chain and freewheel

I've recently (last 6 months) begun riding again after many years away and have begun updating components on my bike (a mid 80s era Fuji). After replacing the rear wheel and freewheel I developed a ...
1
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1answer
928 views

Bent freewheel axle in less than 200km

I am trying to understand if the problem I've got falls into a common problem for freewheel hubs. After googling and reading, I am still not sure if there is only this factor to what has happened. I'...
2
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4answers
156 views

Direction of chain whip

Is there an easy way of working out which way round to apply a chain whip to a cassette for its removal? I've taken plenty of them off in my time but always end up having a couple of tries at it ...
1
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2answers
15k views

what is the difference between a freewheel and a hub

I think these are both just types of casssetes, one all the rings come apart, and the other its just one big piece all welded together. Can someone please tell me what the difference is.
2
votes
1answer
183 views

Can an IGH have the same maximum overdrive-ratio as a crank-sproket setup?

Is there an IGH that gives one the maximum overdrive-ratio that one might get with a 39-53T crankset and a 11-34T freewheel? If not, what is the mechanical roadblock in making one ?
1
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1answer
366 views

7-speed cassette on an 11-speed freehub

Is it possible to use an SRAM cassette PG 730 7-speed cassette with a Mavic FTS-X freehub? According to the spec, no spacer is required for an 11-speed cassette and for 9/10 speed version a spacer is ...