10 tooth to 8 tooth?

[chrispy]

I'm switching out the track on my '06 summit going from a 2" paddle to a 2 1/4" paddle. I'm sure I'd have to go to atleast a 9 tooth, but would I be gaining anything by going to an 8 tooth driver. I plan on clutching the sled anyway so I'm not too worried about that aspect, but would I be giving up too much top/track speed to gain the extra torque of the lower gearing? Would the increased rolling resistance of the 6" dia driver(8 tooth) compared to the 8" dia driver(10 tooth) be a hindrence or should I just go 9 tooth? I mostly ride in fairly tight trees and climb not too much. The gearing is stock at 21/45 and ride at about 6500'.
While I'm at it, has anyone had any experience(good and bad) with single sided extrovert drivers? That's what the dealer is trying to sell me saying that they are stong enough for anything but boost applications. They look kiinda chinchy to me compared to the stock double sided ones on my sled.

Chrispy

 

[chrispy]

No one has done this? I kinda find it hard to believe. How about the inexpensive drivers? No one has run them? I guess that answers that question. I'll get the dealer to order the pricier ones in, just not too sure about 8 or 9 tooth is all.

 

[gman086]

The 8 tooth, 2.52 pitch drivers are too small IMHO because they rub on the front arm upper track clearance loops unless you drop the arm (drill holes in tunnel) so go 9 tooth for sure. The BRP white external drivers are only $50 each or so and those are the ones you want.

Have FUN!

G MAN

 

[chrispy]

That's one thing I hadn't taken into consideration. There are a few people that have posted or PM'ed that they had done it without any problems but didn't mentioned anything about the suspension. Perhaps they had gone to a different pitch with 8 tooth drivers and not had an issue? 9 tooth it is.

 

[bgraff1]

i went with 9 tooth internal/external when i went from a 136 to a 151x16x2.3 track. i did move the front mounting position to the lower/rear position though. i have no complaints with the 9t drivers tho.

 

[chrispy]

Now I just have to find a dealer that has 9 tooth doo drivers in stock. Doo only wants to sell the drivers complete with the shaft. Is there another brand of drivers that anyone would suggest other than Doo or Avid? I'd like to get Avids, but they're a little rich for my blood at this time.

 

[Dynamo^Joe]

I'm switching out the track on my '06 summit going from a 2" paddle to a 2 1/4" paddle. I'm sure I'd have to go to atleast a 9 tooth, but would I be gaining anything by going to an 8 tooth driver. I plan on clutching the sled anyway so I'm not too worried about that aspect, but would I be giving up too much top/track speed to gain the extra torque of the lower gearing? Would the increased rolling resistance of the 6" dia driver(8 tooth) compared to the 8" dia driver(10 tooth) be a hindrence or should I just go 9 tooth? I mostly ride in fairly tight trees and climb not too much. The gearing is stock at 21/45 and ride at about 6500'.
While I'm at it, has anyone had any experience(good and bad) with single sided extrovert drivers? That's what the dealer is trying to sell me saying that they are stong enough for anything but boost applications. They look kiinda chinchy to me compared to the stock double sided ones on my sled.

Chrispy

Dont forget to try the "Gearing Calculator"