providencebikes

i have giant kronos gs and its taking a beating , fist two cogs snapped off i have had only 5 gears since , not so bad , but id like to get my full speed back . im looking around found some exact replacements for cheap but , i need some help , does anyone know what would be better even its 8 or nine cog systems as long as they fit on the wheel and preform better than the original i will be happy , if you know of any cassettes that would work plz le me know in a reply ... try to keep it under 30 bucks i paid 60 for the bike and it daily abuser bike .

Little Darwin

You need to go with the same number of gears if you want the bike to shift properly (assuming you have indexed gearing).

Also, as a 7 speed, you may have a freewheel, and not a cassette. This page will give you some information to figure out which you have:

Freewheel or Cassette?

Retro Grouch 

First question: Cassette or freewheel? I'm betting freewheel.

fietsbob

shimano K cassette (13~34t) Or 13-26 if no low gears needed or a sun race (brand) freewheel.. If a screw on Freewheel

Plus a new KMC chain in either case .

It will be more than your Dream budget cap.

Quote:

try to keep it under 30 bucks i paid 60 for the bike

good luck with that .. all you can do is look for another Junque Bike to cannibalize then..

rms13

Brand new 7 speed freewheel is about $10-15

providencebikes

its a cassette, its 11-28 , shimano / sram , and the 1st 2 cogs snapped off the pins it still works i just have 5 gears , the exact replacement is 15 bucks ... i was wondering if any one out there is a experienced gear builder and had a recommendation on a better replacement ,, seeing as its an older 90s bike it has grip shifters , 3 on the left , 7 speeds on the right , i love this bike its so dope to me , anyway , i really need to know where would you go to build your own custom cassette so i could upgrade my gears and not just buy another replacement i know i will snap because its cheap , , and even its an 8 speed ill be fine if its better .....




ALSO its the hyper glide system so i think maybe any 8 speed hg cassette might fit and what i really want is a 11- 32 7 speed 8 speed if need be i have found sram pg- cassettes but i dont know if they will replace a hg cassette system thing ....., but i see that most 8 speed hg series will still only give me 11- 28 range ill have to settle for a 11 - 28 bloopity blooop whop cares a ma jigger nuts replacement part 2x

and final notes the spacing says sram/shim so i thin the only issue with fittin on the hub is the spacing comaptititntlyibility !!!! so are all sram/shim style rear hubs the same and will accept any shim or sram brand cassette or cassette made to fit sram / shim spaced hubs **********???!!!!!!!!!!!

providencebikes

https://www.sheldonbrown.com/harris/k7.html <<<<<< never mind lol , but anyone out there build their own super cool custom gear ,cogs ,cassette ,thing they would like to share some tips please




AND BTW ONLY PEASANTS RIDE FREEWHEEL ( turns nose in air at idea of using a free wheel )

nfmisso

You will have to replace your rear shifter if going from 7 speed to anything else.

SRAM, Shimano, DNP all make or made fine 7 speed cassettes.

As mentioned above - you MUST replace your chain at the same time as the cassette. You will need a chain tool to adjust the chain to the correct length. I like KMC chains, and use KMC X8.93 chains on all my 7 and 8 speed builds.

Retro Grouch 

None of that makes any sense to me. Sorry.

Miele Man

Your shouted comment about only peasats ride freewheels is a great way to tick a lot of people off.

As far as building a custom cassette goes. You can not buy just one cassette cog at a bicycle shop, you have to buy an entire cassette. A custom cassette means you want cogs that are not available in a standard cassette. For example if you wanted a 13,14,15,16,17,18,19 cassette you'd have to custom build it. to do that you'd have to buy 2 cassettes in order to get the cogs you needed.You'd need the CS739 HG-50 for the 14,16,18 cogs and a CS732 HG-50 cassette for the 13,15,17 and 19 cogs.

Cheers

Bike Gremlin

Any shimano 7 speed cassette will be fine in terms of quality. If the teeth on the sprockets were snapped. If there's some damage on the freehub body, where cassette slides onto the freehub, that's another matter.

With 8 speed, you'll need a new rear shifter, new rear hub (or wheel, unless you want to rebuild the old rim) and basically the only thing you'll gain is one more "fast" speed - 11 teeth sprocket.

dabac

This doesn't make sense.

The pins are only there to make assembly easier. It's perfectly possible to do just fine without them.

You have another problem.

Better for cassettes (of the same design generation) WRT to function is marginal. It's mostly (only) down to surface treatment and weight reduction features.
Some say SRAM are a little smoother/more forgiving. but I've never noticed.
Clean and lube status has a bigger influence on function than brand IMO.

What do you mean by "custom", and what do you want from a "custom" cassette?

Most people who go that route have some very specific requirements WRT gearing ratios.
"Custom" in this case meaning "better for them", not overall better.
It won't be stronger, if you think that's what you need.

I've seen loose sprockets sold once or twice.
Maybe Miche?
Don't know if they still do 7-speed.
Anything else can't be guaranteed to work well with 7-speed indexed shifters.

What do you mean by "upgrade", and what do you hope to get from an "upgraded" cassette?

It'll get you a shinier, maybe lighter cassette, but that's about it.

It won't be stronger, if you think that's what you need.



No.
It won't snap b/c it's cheap.
The one you had didn't snap b/c it was cheap. It snapped b/c something else went/was wrong.
Maybe the lockring wasn't done up tight, allowing the sprockets to move past the splines.
Maybe something else.
Can't tell from here.


7-speed indexed shifters won't let you use a full 8-speed cassette. It'll only be able to set the derailer to 7 different positions.

If your bike is old enough to use an original 7-speed freehub body, it won't be possible to fit an 8-speed cassette on it. The body will be too short.

So buy one:SJS Cycles Online Bike Shop for Touring, Mountain & Road Bikes and Specialised Bicycle Parts

Or settle for a 12-32:SRAM PG 730 12 32 7 Speed Powerglide II MTB Bike Cassette Chrome Fits Shimano | eBay

Ride more, fret less.

AnkleWork

. . . which has nothing to do with bikes.

providencebikes

what i meant by custom is a 7 speed cassette, is a cog set made myself. id like to go no higher than 10 on the 7 th gear and 32 on the 1st . im still new to custom bikes and id hate to just buy a boring replacement when we can make a better one that functions better . i ride up hill every day so i know i need at least 28 on the fist gear , i have a triple in front might go down to double because i rarely ever use the 1st gear but sometime i use the second gear mostly keep it in third , so the cassette i have now again giant kronos GS 90s something road bike with grip shifters , and i love it naa naa na boo boo , is only riding on 5 cogs , so what ever happened the cog pins that keep them in line and secured bent off , or i really dont know i haven't looked in a while lol , but i know the 6 and 7 cogs , just spin and kind of wiggle , point is i want something better and for now i just want to upgrade the single part that is broken so i can go faster because 5 gear just aint cutting it , so i will probably order an acera replacement from
seems lke a good deal BUT!!!!!! before i do ,
,
is there any way to get a fully custom cassette?? are there any companies that sell kits id like to mess around with 8 tooth to 32 tooth 7 speed if possible , im new to cassette makering , any tips plzzzzzzzz thanks

jyl

You cannot go smaller than 11 or 12 teeth. Look at the cassette and you will figure out why that is.

You can buy multiple cassettes and take them apart, use the pieces to make a custom cassette. See the other thread on custom cassettes for more information.

It's probably not worth your while to do this, and I'm not sure you know enough to do it successfully. But all the necessary information is in that thread.

dabac

Again:
- The pins are ONLY there to keep the cassette together when handled OFF the bike
- ON the bike, ALL the driving torque is handled by the SPLINES on the FREEHUB body and the TABS on each sprocket.

The pins bent because SOMETHING ELSE went wrong FIRST.
Something with the spline /tab interface between body and sprockets.
You need to figure out WHAT before you're able to tell what - if anything - to improve.

Otherwise, you're simply replacing parts and spending time and money randomly.

So unless you LIKE random shopping, why not WAIT with buying stuff until you UNDERSTAND what they do?

There really isn't much "fun" that can be done to a cassette.
The big thing about them is which tooth counts they contain.
Two cassettes with the same tooth counts will be (very close to) functionally identical.
They all work very much the same. You can get them lighter and you can get them shinier, but that's about it.
No one but you will ever realize, or care, that you're using a "custom" cassette.

But that's the thing. You CAN'T make a cassette that's overall better in any important way.

That's like trying to make better lug nuts for a car. Or a better radiator cap.

You can tweak the ratios to make it more suited to your riding, but that's better FOR YOU, not overall better.
You can get them a little lighter, and you can get them shinier. That's it. End of story.
You CAN'T get them stronger, because no one needs them stronger. Your failure was NOT caused by weak parts.

So you have:
a triple front
7-speed rear
dream of an 8-32 cassette
and want to go to a double front

Are you sure you understand what that would mean for the rideability of the bike?
(if it had been possible to build such a thing)
Unless you kept the 32 as a bailout gear that's considerably bigger than the others, you'd get very big steps between the gears.
Pretty much the opposite of what people normally want for good rideability.

For a nicer riding bike, keep the triple.
Use the middle and even the small more.
(or possibly replace the middle ring with a smaller one)
Get a tighter spaced cassette.
You DON'T need to go below 11T.
Your bike will ALREADY allow an average rider to stay on power past 30 mph.
If you're regularly faster than that on the flat, you deserve a better bike.
If you can keep it up for more than a few seconds, you deserve a sponsorship.

You do that. Ride more. Do some homework on how bikes and bike riding actually work. And what happens when you change this or that.

For 7-speed, I don't think so. That age is long since past. Not unless you buy cassettes and disassemble them.

For newer stuff, you can still buy individual sprockets:Comparatif Miche Sprockets & Parts on sale at XXcycle - en
or here:Mel Pinto Imports
Or maybe here:Cassettes & Sprockets
Or why not get one of these: https://www.miche.it/products/compone...y-pignoni.html

and tinker away to your heart's content.

You'll have to assemble it yourself.
Doesn't even come with pins.
And expect it to cost several times the value of your bike.
for little to no riding benefit.


Cassettes & Sprockets

jyl

Mike Sherman's Bicycle Gear Calculator

Sheldon Brown's Bicycle Gear Calculator

You might want to spend some time with a gear calculator.

Pay attention to speed at cadence. Good cyclists pedal over 100 rpm cadence when they are going fast. Beginning cyclists, like you, often think they need a higher gear ratio so that they can go faster, but they actually need to learn to pedal at a higher cadence.

bradtx

providencebikes, @jyl has some good advice, I'd really follow it. I confess to not fully understanding how you only have five of seven functioning cogs. While I've never seen it, I suppose it's possible that the engagement tangs on the two larger cogs have broken off or the splines on the freehub have been sawed through. One reason that the larger cassette cogs are bound together is to spread the higher torque load they generate to the freehub. Pictures of the freehub and cassette cogs would be interesting once the cassette is removed (hint).

Brad

RubeRad

But it will gain respect from a larger number of bike aficionados/snobs, because that's most of who hangs out at BF.

fietsbob

one shortcoming of freewheels weak, long 10mm drive side axles ... beefy hubs like Phil wood cures.

loaded tour bike had that for over a decade , now I have a Bullseye tandem hub set doing the same..

cny-bikeman

It may gain "respect" from other snobs, but this aficionado finds such disdainful comments disrespectful as well as inaccurate. There are many on this forum who ride classic bikes that have freewheels, others who can't afford to upgrade to a freewheel. Those people are no less valuable than the poster. Several here have avoided being snobbish about the OP's lack of knowledge and numerous misconceptions. It would be helpful if the OP would follow their example.

For the record, anyone who breaks multiple cogs off a cassette is not going to go faster with a "better" cassette, "faster tires," a "kite fairing" or any other solution that does not depend on learning first how to ride and how the parts of a bike interact with each other and the rider. JYL and DABAC have some good advice above.

Also for the record this "peasant" rode a freewheel bike until 2009, at the age of 60. This "peasant" rode 5,000 miles in a 3 month tour with 30lb+ of gear, 300 miles in 24 hours in the Belle Isle Marathon, raced faster than the OP will probably ever go on the level, went down the Cahon Pass in CA at 55 mph, and commuted as far as 7 miles daily, all on a freewheel equipped bike.

fietsbob

Can't 'Upgrade'.. 7 speed is 1990.. you can just Buy new consumables, which chain and cassette are . same as you had but not worn.

RubeRad

cny, I have a step stool here, let me help you down off that high horse.

OP's all caps signaled to me he was making a joke. And I was not endorsing an anti-freewheel bias, just stating the fact that BF is full of people who are bike aficionados/snobs.

cny-bikeman

All caps is generally considered yelling, not joking, and your statement had the appearance of taking him seriously as well. There was not LOL or smiley, so I took it seriously. Forgive me if I overreacted, but I still disagree with your observation that such a comment would be applauded by "most" of those who hang out here. As far as being on a high horse, my point was not to brag but only to show how wrong such a viewpoint can be.

AlexCyclistRoch

I'm betting that your freehub is ruined. Time to increase your budget....