I have an eno they sound nice fell nice there sealed and have 72 engagement points. eno - The best quality freewheel on the market and the only one designed with trials riding in mind. - 72 engagements gives Chris King®-rivalling engagement speeds, un-paralleled in the freewheel market. - Fully sealed bearing system increases the smooth running life of the freewheel, making it vastly out-live its competitors. - Deep 36t ratchet gives excellent strength and durability. - Two sets of 3 pawls engage at a time to give an engagement every 5º of rotation. - Enclosed pawl and spring pivots mean they cannot come out of place and foul the engagement of the mechanism. - Individually active pawl springs (more accurate and reliable engagement). - High quality case-hardened and then plated steel for ultimate durability and strength. - All parts available separately, so this is a completely re-buildable freewheel. Should any part break, it can be fixed! - Available in 18t only. - 199g. - All spare parts can also be bought. Costs £85 at tarty bikes. Tensile freewheel - Engagement is taken care of by three sets of two pawls, and these engage into a hardened chromoly 20 tooth ratchet (similar to an ACS Claws) to give 60 clicks. - Two sets of ball bearings keep the freewheel running smooth, and help to eliminate flex which can cause skipping. - Fully user serviceable, with all parts to be available separately in the near future. - The freewheel can be removed with a Shimano bottom bracket too. This allows it to be slimmer, meaning more clearance over your BB shell, and thus a shorter, stronger bottom bracket axle can be used. - The lockring is a right hand thread on the 'Front' version, ensuring it does not self-loosen, a common problem found on most freewheels designed for rear use. - Full hardened cromoly construction with nickel plating for maximum durability. - Weight: 181g Costs £35 at tarty bikes. The eno has 12 more engagement points than the tensile. Also on the eno you can replace every part of it. In my opinion i would go for the en I know it's over double the price of the tensile but it is well worth the money. I hope this helps you. Thanks Matt