Bicycle Mechanics - What's missing on my SRAM Rival crankset?

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BikeNSail
09-05-10, 05:58 PM
I've had my bike for about a month. I noticed today that something seems to be missing on my crankset. I'm not sure if the pics show it clearly, but there is no cover on either side, I can see straight through it. Are supposed to be covers on each side, or am I missing a mechanically significant part?

http://i934.photobucket.com/albums/ad185/LKH37/IMG00065.jpg

http://i934.photobucket.com/albums/ad185/LKH37/driveside.jpg

andrewluke
09-05-10, 06:04 PM
normal. My Red crank is the same.
JDMFanatic
09-05-10, 06:05 PM
yup. normal.. my sram crankset is the same as well

BikeNSail
09-05-10, 06:08 PM
normal. My Red crank is the same.

sure looks like there something in this SRAM pic...maybe just a plastic plug that came out?

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andrewluke
09-05-10, 06:12 PM
Looks like an empty hole to me that did not get any light - images like that for companies are not always great for reference because they are there for looking pleasant and not being true-to-life... Unless they decided to do it for Rival only but every Red and Force crankset I have seen had no such plug.
BikeNSail
09-05-10, 06:13 PM
Looks like an empty hole to me that did not get any light - images like that for companies are not always great for reference because they are there for looking pleasant and not being true-to-life... Unless they decided to do it for Rival only but every Red and Force crankset I have seen had no such plug.

I'm certainly no expert, so I guess you're probably right...just looked funny to me...thanks for helping!

EDIT: you're both definitely correct...I found a different pic that does show it's hollow through...

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383
09-05-10, 10:31 PM
yeah a lot of cranks are hollow in the center - its unnecessary space because the rotation is happening around it.