Fits the following chainsaws:


Echo CS-303T

NOTE: This kit includes a sprocket/bar/chain – no need to worry what sprocket you have as you will be replacing it!]





*FREE EXTRA CHAIN* 637257 Oregon Speed Cut Nano Combo [Echo CS-303T ONLY] 14″[35cm] .325 .043 59 drive links


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Stock 3
Part Number 637257-2XCHAINS
Weight 435g
Part Number 637257-2XCHAINS Categories: ,
Cut speed

New Oregon Speedcut Nano System bars are new from Oregon and is Husqvarna/Oregon’s answer to Stihl’s 1/4 .043 chain. Would it have been easier and simpler for customers to understand the chain if they had done a 1/4 .043 version that people already knew and understood? Yes – but then they would not have a unique selling point hence they have brought out .325 .043!

Will it cut as thin as 1/4 .043? No… close but not as thin a kerf.

Will it be a stronger set up than 1/4 .043? Yes – slightly thicker bar and sturdier chain.

Will it last longer and be easier to sharpen than 1/4 .043? Prob yes on both counts.


Features an aluminium core, light weight and designed to run the Oregon 95TXL chain.



Product Description

SpeedCut™ Nano Conversion Kits has been engineered from the ground up with maximum efficiency in mind. Built to optimize saw performance, SpeedCut Nano is the first .325 Low Profile system and meets the demands of tree care professionals like no other on the market.

Product Details

  • For saws in the 1-3hp range (20-38cc)
  • Pitch: .325 Low Profile (NEW) narrow kerf, Gauge: .043
  • Lubritec™ keeps your chain and guide bar oiled for less friction and longer life
  • Longer run time from a uniquely designed SpeedCut Nano 80TXL saw chain which increases saw cutting efficiency
  • Increased speed allows compact saws to take on a big projects
  • Smooth cuts and nearly no cutting chatter
  • Performance that won’t stall in the cut



Additional information

Weight 435 g

Customer Reviews

Based on 1 review
Nathan Robinson
Oregon Speed Cut Nano 1/4 .043[1.1mm]

Having used the new speed cut bar, chain and drive sprocket kit for a few weeks since belying from Rob and I can say that his advice was really good. I’ve used 3/8 as standard on the echo 360 top handle and always been wanting more chain speed in the cut through hard woods and hard dead material. The saw doesn’t quite have the power of a 540 or the 201. I went to 1/4 pitch on a 14 inch bar but with all the care in the world, the saw was just too powerful and splayed the top end at the sprocket.
So Rob said to try the Oregon Speed Cut Nano. The width of the cut is more 3/8 lo pro width but not quite as wide it feels but much wider than a 1/4 pitch bar and chain leaves behind. The absolute surprise though is that the chain speed is very similar to that of the 1/4 pitch chain, with the solid feel of the thicker 3/8 lo pro setup, flies through dead Oak etc to the point at which now I wouldn’t bother going down the 1/4 pitch routes, always look to using the Nano setup first. Cool colours which match up with my echo 360 too. Absolutely brilliant.

Chains that match

  • Oregon wooden file handle

    534370 Oregon Wooden File Handle

    Part Number 534370
    Add to
  • Stihl wooden file handle

    8114907860 Stihl Wooden File Handle

    Part Number 08114907860
    Add to
  • Vallorbe plastic file handle with file angles

    Vallorbe Plastic File Handle with File Angles

    Part Number AL240
    Add to
Please email or call us +44 (0)1590 681259 for sprockets for this chainsaw
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Orders for United States of America must be a minimum of $180.

For all UK orders from Monday 25th Sept there will be no longer be a minimum order but a flat rate of £4.95+vat will be charged to all orders.

Click here for more info for shipping costs