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Shimano Ultegra SL 6650 Hollowtech II Compact Chainset
| Grey | 50 / 34T 165mm | Add this item to your wishlist | ||||
| Grey | 50 / 34T 170mm | Add this item to your wishlist | ||||
| Grey | 50 / 34T 172.5mm | Add this item to your wishlist | ||||
| Grey | 50 / 34T 175mm | Add this item to your wishlist | ||||
Ultegra SL, noticeably visually different to the standard Ultegra and invisibly Technically different. Ice grey in colour and Super Light in nature, SL is here!
The most visible change comes with the colour of the crankset, but whats not immediately apparant is the weight loss and performance gain. The performance improvement is largely due to the lighter, stiffer, machined steel bottom bracket spindle. The weight saved with the SL crankset is 35g over standard Ultegra, the SL is also fitted with aluminium chain ring bolts, ala Dura-Ace, to further emphasize its aim at the performance end of the market. Chainrings are ramped and pinned for optimum shifting under load and provide smooth and precise shifting.
Weight is down to under 800g including the bottom bracket.
Available in 165 mm, 170 mm, 172.5 mm and 175 mm with a 110PCD and a 50/34 chainring combo
Shimano road chainsets do not include a bottom bracket, you will need to order this seperately in English(68mm) or Italian(70mm) threads to suit your frameset
Your chainset must fit onto your bottom bracket! There are currently four chainset/bottom bracket interfaces that you're likely to come across. If your bottom bracket is made by Shimano and it has splines, then you need an Octalink chainset. If your b/b is NOT made by Shimano and it has splines, it's almost certainly ISIS. There are a very few non-Shimano chainsets with Shimano Octalink interfaces so, to be sure, count the splines - ISIS has 9, Octalink has (surprise, surprise) 8. No matter which brand of b/b you have, if it has a square interface, it will require a traditional square taper chainset. If you have one of the new Hollowtech II systems, you will need to choose the exact chainset that matches your bottom bracket. Most MTB chainsets are now 9-speed compatible but these will work with an 8-speed system.
Shimano are the makers of the world's most well known cycle component brand. Established in 1921 when the first cycle freewheel was forged. Shimano produce drivetrains, wheels, pedals, shoes, cycling clothing and pretty much every Shimano cycle accessory you can think of! Famous for their top end products ridden by the pro's, Dura-Ace and XTR, which cover both road and MTB's. At Shimano, they're doing everything they can to respond to heightened environmental concerns. Shimano are proud to be a producer of bicycle components that help people to enjoy outdoor sports and interact with nature through healthy non-polluting activities. In their 87 plus years of existence Shimano have accumulated a wealth of technology and product development and expertise that serves as the driving force behind their continually evolving product line.
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