Shimano Deore confusion

MTB noob

I've just recently bought some Shimano Deore "hollowtech" 48t 3 speed crankset but once i bought them, i found that the cranks say hollowtech, but have a square taper.

I also want to know if it was an alright buy as they are almost immaculate (apart from a bit of arm wear) and weigh roughly 800g for £25?

I'm a bit confused by this but can anyone explain?

Thanks

Chunkers1980

Hollow tech is hollow arms, hollow tech ii (HTII) is more external type bb with a hollow axel ect

MTB noob

Thanks. I didn't know there were 2 different meanings of hollowtech in chainsets.

heez29

There isn't. Hollowtech is the arms. There is just two type of Hollowtech chainsets. 1 is internal bound BBs and 2 is external BBs.

adamfo

MTB noob wrote:

Thanks. I didn't know there were 2 different meanings of hollowtech in chainsets.

Your confusing Shimano Octalink or square taper crank spindles. Hollowtech is the crank arm type.

bennett_346

My head hurts. Isn't hollowtech just the BB/crank interface? What does it have to do with the crank arms?

adamfo

The arms are hollow ! That means a bit lighter than the cheaper Shimano solid forged ones. That's all it means.

I used to have a non-series shimano crankset with both Hollowtech and Octalink stickers on.

heez29

bennett_346 wrote:

My head hurts. Isn't hollowtech just the BB/crank interface? What does it have to do with the crank arms?

All hail...

Sheldon Brown wrote:

Hollowtech ®
Shimano's name for the hollow forged cranks used with Octalink ® splined bottom brackets. These lightweight cranks are made by welding two forged aluminum channels together.
Hollowtech II ®
The two-piece crank /bottom bracket system introduced with the 2004 10-speed Shimano Dura-Ace line. These use external bearings that hang outboard from the bottom bracket shell.

http://sheldonbrown.com/gloss_ho-z.html#hollowtech