Ah, thank you!
Amazon has some but they won’t deliver until June 4-20th. Do you have any recommendations for vendors that might be able to ship more quickly? I need a 312 but it sounds like the standard is 320, so it sounds like a bit of idler is in my future anyway
Update, I found some that will ship sooner
315 is a commonly stocked length.
I had this issue for long time on 12s single 45a. Colution - drill additional holes in plate to add 2 tentioning pulleys. Never been happier
vbeltguys for the win if yur US… theres a code here for like 15_20% off somewhere…
this is 10 off: TEN10TENOFF
@DougM what pulleys do you have? are they 3M or 5M? If they are 3M you would need to find 5M ones to match the bigger belt teeth.
@SaturnCorp - Good catch - they are 3M pulleys.
This is good because I’ve been meaning to change the ratio anyway - I need a bit more climbing power and bit less top speed.
The current ones (for 6" pneumies) are 72:18 teeth.
Can you recommend a place to order the 5M’s with something like 80:18?
Thank you
I’m feeling like if u dropped 3 teeth off the motor on 6" that would be a good pop of torque already
That’s about a 4.4 ratio so you’d be looking for a motor pulley with around 15 teeth (15 is the general consensus on the smallest motor pulley that can be run without slippage) and a 66 tooth pulley.
I’m not sure what wheels you have so finding the wheel pulleys will probably be the hardest unless they are a common hub. Any motor pulley with the right size/shape bore for your motor shaft and setscrew or keyway will work. I recommend Torqueboards and BKB for those.
I found a 72 at SDP-SI but they are out of stock. that led me down the rabbit hole of trying to make my own 80T, which I can do, but it will take a long time and I don’t have the right material in stock, so more $$$.
Neither Torqueboards (DIYElectric) nor BuildKitBoards have 72T, but I’ll order a few of the drive pulleys in different tooth counts (15 - 18 as you guys recommend).
I’m running 6-shooters but I can modify any pulley, I just have to find one.
Thank you,
Check this out , https://www.janux-esk8.com/product-page/pulleys-to-fit-6-shooter-hubs . I bought from him in the past and great products fairly priced and responsive seller. The pulleys are made of POM so should last you a while. He might also have some belts in stock and he also have motor pulley 
. Hope this helps.
Methinks aluminum wheel pulleys and steel motor pulleys much, much better.
Yeah sure aluminium pulleys are ideal but if strapped for cash pom is fine.
The links for steel motor pulleys and belts on the same site.
True that
I just wouldn’t describe them as long lasting.
Fair enough, medium lasting?
that janux pom pulley is almost twice as expensive as that sdp aluminum pulley you linked
eight weeks of summer riding is priceless though
True but 
