How much does a SISL1 set weigh?
I hope you can use the new arms and axle with the standard spider.
Either way - I want!
Granted this is only one short write-up from one source, but I'm surprised that no one has mentioned the glaring potential lack of compatibility with quarq and SRM. Does anyone --*AHEM* paging starnut-- have any more info?
I look forwarding to buying second hand SISLs though once this hits and people haaaave to get them.
Phill P wrote:How much does a SISL1 set weigh?
The Hollowgram SISL weighs ~570g all in for a compact crank. That is with crank arms, spider, MK V chainrings, spindle, bearings, crank arm bolts, bearing shields, spacer...etc.
The 484g in the quoted article is for spidering, SiSL2 cranks arms, bolts and spindle. So not a 100% accurate comparison.
SISL crank arm bolts= 15g
SISL spindle= ~60g
Equals: SISL @ 498g compared to SISL2 @ 484g.
Throw in the BB30 bearings, bearing shields and spacers and you get the SISL to 571g of the initial picture posted above.
Now if the new SISL2 includes the BB30 bearings at the weight of 484g, then it is quite impressive. However at the moment it looks like it might be around a 15-20g difference.
As this is WW, that is heavier than the SISL version. Might be slightly "stiffer" per the article. But the SISL itself is quite stiff. Never heard anyone complain that they wished it was stiffer. Plus the current Hollowgram gives you the option to easily convert from compact to standard and from road to MTB.
Their new SiSL2 cranksets are 100% CNC machined in a clamshell design that’s bonded together. The spindle has been machined down more, too, which also made it stiffer. This model has additional machining to save weight, and the remaining material was move around inside the arms to improve the strength. So, these are both lighter and stiffer.
So really the "benefit" is slightly less weight (will need to wait until pics of it on a scale) and the increased stiffness.
Powermeter option is sort of gone with this one......
No reason or principle contain it or stand against it........"
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