Lighter crankset option than my DA 9100?

[Noctiluxx]

I'm looking to upgrade my DA 9100 (52-36/170mm) crankset to something lighter, stiffer, and asthetically nicer. I'm aware of THM Clavicula SE cranks, and not much else. My bike is an Oltre XR4. Thanks!

[Lelandjt]

Sram Red are the cheapest light cranks, especially if you have a BB30 or PF30 frame. Claviculas are the ultimate if budget allows. Lightnings fall in between and if you have a PF30 frame you can sometimes find the Specialized version of Lightnings for fairly cheap on ebay.

I don't think there's anything out there significantly stiffer than 9100, just lighter.

[alcatraz]

If you have a pf86 frame it's likely you have a 41id bb shell. This means you will be stuck with heavier 22-24mm axle cranks like shimano hollowtech and sram gxp.

Going with sram gxp or maybe fsa kforce/slk (swap chainrings) would be a little lighter than r9100. But not by much. I'd say keep the r9100. It's already hard to improve on @640gr.

/a

[Mostlyharmless]

basically every crank is lighter than Dura Ace

[eric01]

Easton carbon or the rotor huez?

[kode54]

big difference between those two. and depends on your budget.

I'm looking to upgrade my DA 9100 (52-36/170mm) crankset to something lighter, stiffer, and asthetically nicer. I'm aware of THM Clavicula SE cranks, and not much else. My bike is an Oltre XR4. Thanks!

[madcow]

If you have a pf86 frame it's likely you have a 41id bb shell. This means you will be stuck with heavier 22-24mm axle cranks like shimano hollowtech and sram gxp.

Just for the sake of clarity that isn't correct, with BB86 there really isn't a problem using a crank with 30mm spindle. Thm, Lightning, Easton, Praxis etc... all make bb86 bottom brackets for their cranks. The limits of spindle size become a problem when you go down to bb90. It's possible to fit a 30mm spindle into a bb90, but the bearings in that case are so small that they don't hold up well.

[alcatraz]

30mm crank in a 41id shell would leave 5.5mm for the bearing AND cup. That is not a large ball spinning around in there. I'd avoid it myself...

If the bearing were super high quality and the rider light as a feather it might work ok.

/a

[madcow]

30mm crank in a 41id shell would leave 5.5mm for the bearing AND cup. That is not a large ball spinning around in there. I'd avoid it myself...

If the bearing were super high quality and the rider light as a feather it might work ok.

/a

Most of the bb86 for 30mm, or 4130 bb's as some like to call them don't have a separate bearing and cup. Most are now being made with a lip so that the outer race of the bearing is the cup. This leaves enough room for a decent sized bearing. Thm and others have been making them this way for years and we've never really seen any issues with them.

[Hexsense]

yeah,
let see, BB86 use 41mm outer and 37mm inner cup and bearing with 37mm outer 24mm inner.
Their bearing is also (37-24)/2 = 6.5mm
Actually, most bearing are not even have 24mm inner but rather a standard size 6805 bearing which has 25mm inner. pair with 1mm hat to make it 24mm. So more like 6mm for the bearing.

Not much bigger than a direct fit 4130 bearings without cup (5.5mm)