Truvativ Hammerschmidt
Truvativ Hammerschmidt
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 TruVativ HammerSchmidt Crankset All Mountain 170 24T  US $285.93
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 Truvativ NOIR RED TRANSLUCENT SELECT bike protection by CRANKSKINS US $16.99
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 Campagnolo Record FRAME CRANK bike protection by CRANKSKINS US $14.99
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 SHIMANO DXR FC MX70 CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 Shimano 6700 Ultegra FRAME CRANK bike protection by CRANKSKINS US $14.99
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 CRANKSKINS 3 4 universal bike frame protection products by CRANKSKINS US $14.99
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 Truvativ NOIR GOLD TRANSLUCENT SELECT bike protection by CRANKSKINS US $16.99
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 Truvativ NOIR PINK TRANSLUCENT SELECT bike protection by CRANKSKINS US $16.99
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 20 mil thick PRO PACK Clear Road MTB bicycle Frame Protection by CRANKSKINS US $21.99
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 CRANKSKINS fit Shimano Dura Ace 7900 FRAME CRANKSKIN US $14.99
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 Truvativ NOIR CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 Truvativ Hammerschmidt X0 Shifter X0 X 0 2 Speed US $80.00
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 Truvativ Hammerschmidt 83 mm Bottom Bracket US $35.00
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 Truvativ Hammerschmidt FR Crankset 170mm US $390.00
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 Truvativ Rouleur Carbon GXP FRAME CRANK bike protection by CRANKSKINS US $14.99
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 New Truvativ Hammerschmidt 68 73 mm Bottom Bracket US $38.00
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 SHIMANO XTR 970 Ti Look bike protection by CRANKSKINS US $16.99
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 Truvativ Hammerschmidt FR MTB Downhill Crankset 170mm US $619.95
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 Truvativ Holzfeller CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 Campagnolo Centaur CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 TRUVATIV HAMMERSCHMIDT AM MTB CRANKSET 175MM US $649.95
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 SHIMANO XT 770 MAGENTA bike protection by CRANKSKINS US $16.99
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 SHIMANO XT 770 Ti Look transparent bike protection by CRANKSKINS US $16.99
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 Race Face DEUS Ti Look bike protection by CRANKSKINS US $16.99
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 SHIMANO SLX 660 CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 SHIMANO XT 770 CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 3 4 Universal Skull Crankskins Frame Crank Protector US $10.99
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 3 4 Universal Finger Crankskins Frame Crank Protector US $10.99
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 Marley 3 4 Universal Crankskins Frame Crank Protector US $10.00
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 Rasta 3 4 Universal Crankskins Frame Crank Protectors US $10.00
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 SHIMANO XTR M960 CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 2010 HAMMERSCHMIDT SRAM TRUVATIV Crankset 22 x 36t 175mm Mtb Mountain NEW US $308.97
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 Truvativ XX GXP FRAME CRANKSKINS US $14.99
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 Truvativ NOIR ICE BLUE TRANSLUCENT SELECT bike protection by CRANKSKINS US $16.99
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 Truvativ Stylo 33 CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 FSA K Force CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 FSA SLK Carbon CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 RACE FACE NEXT SL CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 SHIMANO SAINT HIPPIETECH SUSPENSION bike protection by CRANKSKINS US $16.99
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 Campagnolo Centaur Carbon FRAME CRANK bike protection by CRANKSKINS US $14.99
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 SHIMANO Dura Ace 7800 RED bike protection by CRANKSKINS US $16.99
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 HAMMERSCHMIDT TRUVATIV Mechanism Assembly w Drive Side Crank Arm 22 x 36t 175mm US $208.97
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 SHIMANO Dura Ace 7800 Ti Look bike protection by CRANKSKINS US $16.99
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 SRAM Red CLEAR FRAME CRANK bike protection by CRANKSKINS US $14.99
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 SHIMANO XTR 970 GOLD Crankskins bike protection by CRANKSKINS US $16.99
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 Truvativ Hammerschmidt Crankset 170mm US $413.99
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 Shimano Hone HollowTech II M600 FRAME CRANK bike protection by CRANKSKINS US $14.99
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 Truvativ Hammerschmidt Bottom Bracket All Mountain 83mm fit Norco Santa Cruz $65 US $39.90
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 Cannondale Hollogram Ti Look bike protection by CRANKSKINS US $16.99
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 TRUVATIV HAMMERSCHMIDT FR MTB CRANKSET 175MM US $589.95
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Planetary Crankset Friction Losses?
Regarding the new Truvativ HammerSchmidt, Schlumpf Mountain Drive cranksets that offer two ratios.
What are the frictional losses in each of the gears? Does the lower or higher ratio have the most friction?
Why does the SRAM offering have such a small difference between the ratios? Since cogsets already offers 3x range (11:34), why not at least a 2x range for the planetary front?
So which is the locked ratio and which is the one that uses the gears?
I still see no reason to limit the "overdrive" ratio to such a small increment.
If I read the SRAM site right, the reason for the ratios that they chose for the H.S. was based around the standard Freeride front ring selection of 24/36/bash or 26/38/bash. The proposed advantage is that you get the same gear ratios in a smaller package, less diameter hanging down to get hung up on obstacles.
The friction losses are as to be expected - less when in the "locked" ratio and more in the ratio that uses the gears when they are engaged.