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Bottom Bracket Replacement
$50.00
Complete bottom bracket replacement (includes both bearings).
MegaExo 19 Cartridge BB
Eng 68mm for Metropolis PT BB-4000P {CK-5000T}
Description
The only bottom bracket designed for the Patterson Transmission Crankset.
FEATURES
- —Die-cast then CNC machined alloy external non-drive side cup
- —Forged steel and CNC machined drive-side cup for better shifting mechanism support
- —Composite center sleeve w/ double o-ring seals
- —Finish: black cups
SPECS
- — Sizes: English threading – 68 mm width (BC-1.37in x 24T)
- — Weight: 108g
Dear SamI would like you to know that your invention is awesome!It was easy to fit with good clear instructions. It worked perfectly first go.It will now enable me to pull away on my trike on any incline by dropping the ‘front cog’ w… Read more
Here is an initial pic on my Santa Cruz Blur, XC. Just back from 7 days riding in Mammoth…still love the transmission, although I must admit that most of the riding was slow, steep, technical riding, where I mostly used the low (1:1) range on… Read more
Dear Mr Patterson,Ted did an excellent job! His buddies Mike in New Orleans and Michael in Mt. Vernon (luxury car mechanic) helped and it’s all good.I’ve been riding it everyday and playing around with the gears. Yay!!I took a bike ride… Read more
Since I originally emailed, I purchased an FSA Patterson Drive and installed it on my Surly Big Dummy with an old XTR 9 speed rear derailleur (11-34) and absolutely love it. It’s great being able to drop into the low gear while stopped at stop … Read more
Dear Mr Patterson,My husband wants to thank you for you help in removing and installing your Metropolis Patterson Crank drive. Here is his message to you and a picture of his bike:So, Mr.Patterson, thanks for helping my wife install your … Read more
“I am pleased as punch with my Patterson drive. A common problem when I bike in the winter is my derailleurs gumming up and failing. The Patterson has a sealed mechanism that protects it. Another reason I bought the Patterson drive is to give my… Read more
One really cool thing, …is that the removal of the front derailleur (along with the removal of the big ugly chainrings) gives a bike a much sleeker look.
I recently purchased some Metropolis cranks for my 2011 Kona Unit.I have installed the cranks and I am really happy with their performance! Currently, I am looking at cleaning up the cable routing as I have had to McGyver a way to make the … Read more
“Sam, I do a lot of road biking in the summer probably travel about 2500 miles in 4 months if not more .. I have an 8 speed sturmy archer internal hub on my terratrike rover.. before I got your patterson crankset I maxed out my requmbent.… Read more
Hi Sam,I wrote you some time ago with various questions about the PM, which I use in combination with a NuVinci N360. This email is an update.In June I flew my little folder from Kuala Lumpur, where I live, to Bangkok where I started … Read more
Hello Sam I hope your enjoying your weekend.Attached is a pic of my touring/commuter. It’s a Surly Crosscheck, with your Metropolis crank, 3speed Shimano Nexus, and Shimano generator hub supplying power to the E3 front light, rear light and … Read more
Subject: Video of Experimental Human Powered Moonbuggy using Patterson Transmission CranksetThe Experimental Vehicles Program at Middle Tennessee State University utilized your transmission cranksets in our NASA Human Exploration Rover… Read more
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