Do Hollowtech II cranksets w/ integrated BBs really save weight?
According to weightweenies.starbike.com, a XT M760 w/ integrated BB weighs about 865 g. If you compare this to the previous generation Hollowtech splined model w/ a comparable BB, you'd get M752 + ES71=> 625 g + 255 g = 880 g.
15 g is a pretty pathetic weight savings if you ask me... Is my math wrong or did I not take something into account?
According to weightweenies.starbike.com, a XT M760 w/ integrated BB weighs about 865 g. If you compare this to the previous generation Hollowtech splined model w/ a comparable BB, you'd get M752 + ES71=> 625 g + 255 g = 880 g.
15 g is a pretty pathetic weight savings if you ask me... Is my math wrong or did I not take something into account?
With the new intergated cranks you get away from the crappy ISIS BB with the outboard bearings.
So in summary, you get a slight weight savings, stiffer cranks and more reliable BB.
Dad...isn't the word "abbreviation" being hypocritical being so long.... My 11 year old daughter.
In the first place, I don't really understand what's with the logic about XT not being less inferior compared to XTR.
XTR'04 cranks weigh about 796g and is so stiff, I couldn't ask for more myself. As a ex-XT gruppo user, I find that the cranks do flex under my 200lbs of meat.. especially when I pedal very hard to speed up. but not with the XTR. I never did get any form of flex whatsoever.
I have since changed to full XTR after feeling how stiff hey actually were and hey, they saved alot of weight compared to XTR.
one more thing, XT stuff durable?! I hardly think so. ALL my XT chainrings and cassettes worn out after 4 months of hard riding , but with XTR.. there was not much wear even after about 8 months usage with no problems in shifting.
I'm not an extreme weight weenie... but with the XTR group... I can and would testify myself as an extremely satisfied user of these components. but not so with XT.
Small decrease in weight, HUGE increase in stiffness. The 05 XT cranks are much stiffer, and this helps a lot with power transmission.
Agree w/ Jm. I have both. I can feel the difference. XT inegrated is much stiffer. And, that is saying something because the XT M752 cranks wer pretty darn stifff. What even amazes me more is that the 05 LX cranks wieght only about 80-90 gm more than the XT,but they are stiffer than the old XT 752. We put the new LX on wife's FS and I was thoroughly impressed. IMO, if you are not a weight weenie, the LX is a great bang for the buck.
Is it just me or does anyone else think the new (ish) integrated XT design looks a lot nicer than the XTR?
The old (pre-integrated B/B) XTR looked realy neat, but now I think the XT looks better.
I have to admit, I like the LX/Hone angular/Picasso cubist look of the arms the best. That and seen mounted to a frame they look so wide, they really say "strength".
I know its an asthetic thing, but it looks sweet, IMHO.
On another note, remember that a less stiff crank like the 03 XT's deflection will act like a spring and return most of that energy when the pressure lessens as the crank arm fights it's way back into original shape.
Before I get flamed for not following the marketing piper I should post this Keith Bontrager article about stiffness (it is google cached as they just changed websites and pulled his articles - naughty!): http://216.239.63.104/search?q=cache...tiffness&hl=en
In the first place, I don't really understand what's with the logic about XT not being less inferior compared to XTR.
XTR'04 cranks weigh about 796g and is so stiff, I couldn't ask for more myself. As a ex-XT gruppo user, I find that the cranks do flex under my 200lbs of meat.. especially when I pedal very hard to speed up. but not with the XTR. I never did get any form of flex whatsoever.
I have since changed to full XTR after feeling how stiff hey actually were and hey, they saved alot of weight compared to XTR.
one more thing, XT stuff durable?! I hardly think so. ALL my XT chainrings and cassettes worn out after 4 months of hard riding , but with XTR.. there was not much wear even after about 8 months usage with no problems in shifting.
I'm not an extreme weight weenie... but with the XTR group... I can and would testify myself as an extremely satisfied user of these components. but not so with XT.
I got a 2005 LX set last October and ridden over 2,500 km on it to this day. It works perfectly. It's not the typical WW set, but not heavier than a 1998 XT set for example. The cranks are my favourite: the aluminum axle feels stiff and I managed to save 5 mm Q-factor by modifying the interface, so now I use no spacers for 68 mm BB! I changed the chainrigs and bolts and the weight is down to 875 gr. Next, I'll sandblast it and give it a blue anodized finish to match my XTC... Of course, I recommend you to buy the XT: it's cheaper than these modifications, but it's not blue :-)
Agree w/ Jm. I have both. I can feel the difference. XT inegrated is much stiffer. And, that is saying something because the XT M752 cranks wer pretty darn stifff. What even amazes me more is that the 05 LX cranks wieght only about 80-90 gm more than the XT,but they are stiffer than the old XT 752. We put the new LX on wife's FS and I was thoroughly impressed. IMO, if you are not a weight weenie, the LX is a great bang for the buck.
Well, they are still a good bit of $$$ in a bike shop, expect to pay around $180 for the LX setup, around 280-300 for the XT, and at least a mont's rent for XTR
I want to get some of those 05 LXs in our shop though...
I know in my heart that Ellsworth bikes are more durable by as much as double. AND they are all lighter...Tony Ellsworth
anyone out there still using a top-end square taper (i.e. Phil Wood, Action Tec) ?
I'm going against the grain and putting the following on my new HT:
Action Tec Ti square taper
Ti bolts and washers
Race Face Next (brand new off eBay)
Sugino 42/32
Vuelta 20
I have been looking everywhere for them. You may have bought the RF Next cranks I was eyeing on ebay. They are still out there. Any guideance you can give on locating sugino rings would be greatly appreciated.
Well, they are still a good bit of $$$ in a bike shop, expect to pay around $180 for the LX setup, around 280-300 for the XT, and at least a mont's rent for XTR
I want to get some of those 05 LXs in our shop though...
....or you could order from Germany and buy XTR for about the same price as XT in the US.
When I got my first set of the Sugino 42/32 + Vuelta 20t combo, I knew this was going to be a sweet set! So I immediately started searching around the internet for a second set because the word (this was last year, by the way) on the street was that Sugino no longer makes those rings.
I was lucky enough to find another new Vuelta off eBay, and the Sugino's from, again, either waltworks or bikeman...I'm pretty sure they don't carry them anymore...
The Vuelta 20t, however, will be on eBay from time to time.
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Originally Posted by burndtjamb
