i want to know where I can buy a 64t chain ring set for the carryme.

bfold.com

I find support for big rings a pain. Most Trike, folding, and mini-velo vendors have them, but they can be extremely expensive.

If you are flexible, here are some options that won't break the bank.

61T, Ramped and pinned, $52.47

61T, Ramped and pinned, $52.50

68T, No ramps, $64

69T, Aero, No ramps $72

70T, Aero, No ramps, $73.28

75T, Aero, No ramps, $79

What are you using for the rear freewheel/cassette? Rear gear ratios?

CarryMe doesn't use a standard chain and crank arm. Their chain ring/wheel has a 4 bolt pattern instead of the usual 5. Chain I think comes as a loop/connected(no pinning/quick links); not the usual bike chain. So you're stuck getting the factory parts from a distributor/dealer.

Oof...

So, it looks like a couple of potential issues. I'm seeing photos of bikes with 4-bolt and 5-bolt cranks. However, I'm seeing that the bike comes stock with 84T front, 14T rear.

https://www.pacific-cycles.com/files/...r%20manual.pdf

However, everything says "tiny teeth", but nothing seems to be listing the actual sprocket pitch.

So, going from 84T to 64T would be much lower gearing.

So, any idea what the chain type/pitch is?

Here are some notes about chain pitch:
GC

64T, #35, and #219 gocart rings are relatively common, and not too expensive. The trick would be to adapt the gocart ring to a bicycle crankset.

https://www.ebay.com/itm/64T-Split-S...t/201015192571

https://www.ebay.com/itm/219-6061-T6...g/123025736639

Another option might be seeing if one could replace the rear sprocket with one slightly larger. Say 16T or 18T. The clearance around the rear chainstays also looks tight, so going bigger could be an issue.

I got mine through bfold but am looking to change out the rear sprocket. The gear ratio is a tad low at 36 gear inches . With a 13t I could get it to 39 gear inches. Does anyone know if the Carryme uses a #25 chain and sprocket?

There are a few overdriven internal gear cranks to multiply the smaller gear to act like its bigger though physically not..

1: 1.6..

My bike is 2013 and the bb is too thin at 3mm's for a speed drive crank. Utah Trikes told me that 5mm's is standard for the speed drive. Also Max Yeh from Pacific Cycles told me the same. But Max told me that the chain and sprocket are #25 size so I'm going to try changing the sprocket as the chain tension has room for adjustment.

Patterson metro is using a more normal sort of external bearing BB https://www.pattersonbike.com/
ask for a 40t chainring and there is your 64t overdrive..

Thank you for the information, I'm not sure how this crank would work with the Carryme drive train. I wrote Patterson bike asking if this would be compatible with the #25 chain and chainring. I've seen Carrymes with bike cranks online but am not sure how to go about making a regular bike chain and chainring work.

The Patterson has its own chainring interface, not common 5 or 4 bolt.
un specified otherwise they ship with a 28t.

want that physically big ring try Here, *
(USA, Cycle Monkey in Richmond Cal)

mountain drive - schlumpfdrive - ultraflat Planetary Gear for Bikes

130 bcd; T #:38T, 40T, 42T, 44T, 46T, 48T, 50T, 52T, 54T, 56T, 60T, 65T, 70T, 75T...
CHF is higher, than the Euro, so they moved the company out of Switzerland,
for better costs.


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