Larger Cassette on CRX four?

[Billy22Bob]

See picture of my current 13-26T (8speed)
I have a 28-38-48 on the front with 700x28's

In a desire to get up hills better I was looking at a 11-30T or preferably a 11-32T cluster running off the 28 = 0.93 Ratio or 0.88.
Much better than the current 1.08

I'm fairly new to this - but being an engineer at heart - I like to delve into the options.

I have a photo that shows max and minimum derailleur swing. But cant work out how to post it on this forum

Given the 32T would be another 6T=3", and the derailleure is way extended,
I'm guessing Id need another 6 links in the 108L chain.
Will the current hanger achieve this?

Questions
1. Can I squeeze a 30T onto this bike?
2. Maybe a 32T?
3. Would I go for a 114L chain - probably time for a new one.

Thoughts appreciated.

[Duck!]

What model derailleur is on it?

[Billy22Bob]

how can I post a photo - I have one from low to high and the change in cage length

[Bunged Knee]

how can I post a photo - I have one from low to high and the change in cage length

Haven't you read this yet??????

viewtopic.php?f=6&t=23303

[Billy22Bob]

[Billy22Bob]

Questions
1. Can I squeeze a 30T onto this bike?
2. Maybe a 32T?
3. Would I go for a 114L chain - probably time for a new one - Current Chain is a 108L
4. Would you call that a Medium Cage?

Front Chain rings 28-38-48 - Rear are 13-26

Newbie.......Doing one calc indicates (48-28)+(26-13) = 33 - yet derailleur looks well extended

[uart]

Given the 32T would be another 6T=3", and the derailleure is way extended,
I'm guessing Id need another 6 links in the 108L chain.
Will the current hanger achieve this?

You don't need to add 6 extra links for a 6 tooth jump (remember that just under half of the links actually engage the large rear cog). I'd add either 2 or 4 links.

BTW. What front rings are you on in those photos? You need enough length to just make sure that you can't bust anything if you accidentally cross chain big-big, but if small-small is a bit loose and rattly it's not really a problem (I just think of it as a gentle reminder not to cross chain when my small-small combination starts rattling with a loose chain).

[Billy22Bob]

I purposefully made sure the chain was on Big Big and Small Small = min/max chain length in the photo

I see the half cog thingy too - thanx

s

[Duck!]

Looks like a 2200 (predecessor to Claris). 28T max for that.

[Billy22Bob]

I guess the main idea is to go up hills - so big+big wont happen...
rose coloured glasses .

[Duck!]

That derailleur still won't fit bigger than 28, the geometry doesn't allow it.

[Billy22Bob]

Hmmm.. bigger cage???

[Duck!]

No, different derailleur. The upper body geometry dictates maximum sprocket size. Cage length dictates the total gear range by how much chain it can wrap.

[Billy22Bob]

Looks like a 2200 (predecessor to Claris). 28T max for that.

Copy that - thanku -
crosscheck here
https://www.greenwich-market-trader.co. ... p?ITM=9336
"Maximum Sprocket: 26T; Smallest Sprocket: 11T"
.....after some reading - I suspect I also have a "Standard Mount Hanger - Dropout 266"

So...Do I move to the front 28-38-48 and see if I can put on a 24 on there? (Newbie question)
OR
What rear would suit?.....
something like this? https://www.ebay.com.au/itm/28493401150 ... Fw62LYQ</a>

[Duck!]

That derailleur you linked will work, but a modern Claris or Sora will be better, and still a budget option. Both with take up to 34T.

[Billy22Bob]

I don't think the bikes worth it.....
I paid 90 bucks for this bike - mind u it is in pristine condition

Currently
TY300_RD + (13-32)Cass + 106LChain /wlink + chain tool = 23+25+16 = 64 (+10 tool)

[uart]

That derailleur still won't fit bigger than 28, the geometry doesn't allow it.

Hi Duck. I've heard that with Shimano stuff you can usually get away with +2 tooth count over the official limit. Would be the case here, would it be worthwhile the OP trying a 30T and seeing if they can get it running satisfactorily for their purposes.

[Billy22Bob]

from my 26T to a 30 - prolly not worth the hassle. What do I do with a 30T if it doesnt work.
Im edging towards getting a 13-34 and a cheap dr+chain

[Billy22Bob]

Duck,
Be interested in your comments on this guys approach
https://www.youtube.com/watch?v=mltI7fkfP5I

[Duck!]

That derailleur still won't fit bigger than 28, the geometry doesn't allow it.

Hi Duck. I've heard that with Shimano stuff you can usually get away with +2 tooth count over the official limit. Would be the case here, would it be worthwhile the OP trying a 30T and seeing if they can get it running satisfactorily for their purposes.

Newer-series stuff has a bit more tolerance, however older-model stuff such as the OP's 2200 is true to its stated maximum. I had a similar-vintage 3300 Sora on my commuter bike that barely cleared a 23T when its mount-pivot spring wore out!

Duck,
Be interested in your comments on this guys approach
https://www.youtube.com/watch?v=mltI7fkfP5I

Important thing to point out is the derailleur in that example is a much newer model with very different geometry to more traditional designs, and even in "short" form is a relatively big derailleur. I didn't watch the whole clip, but as soon as I saw what model he was using, I know it works. That derailleur will actually fit up to a 36T rear sprocket, but due to the amount of chain slack the cage can take up, chainring range would need to be reduced to a maximum 14T difference.

[Billy22Bob]

thanks everyone......!

[Billy22Bob]

Looks like a 2200 (predecessor to Claris). 28T max for that.

Copy that - thanku -
crosscheck here
https://www.greenwich-market-trader.co. ... p?ITM=9336
"Maximum Sprocket: 26T; Smallest Sprocket: 11T"
.....after some reading - I suspect I also have a "Standard Mount Hanger - Dropout 266"

So...Do I move to the front 28-38-48 and see if I can put on a 24 on there? (Newbie question)
OR
What rear would suit?.....
something like this? https://www.ebay.com.au/itm/28493401150 ... Fw62LYQ</a>

Nearly clicked BUY and then .....
Q....would a 11-34T cassette work with this derailleur - reminder my front is 28-38-48 (20T range) = 43T total
Q2....that particular derailleur says 6-7speed - just like to confirm it will do 8 speed. I know the listing says 8 but the decal on the unit says 6/7
Q3....going from a 13-26T (13T) cassette to a 11-34T (23T) =+10T = how many xtra chain links ...5L????
Q4....I'm guessing I should repack the bearing whilst I'm at it - yes?
Q5....do I need to also buy a B-Link to fit this or will it fit my current standard mount?