Profile Racing Imperial Sprocket (Black) (42T)
IMP42BLK
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The Profile Imperial sprocket is CNC machined from billet aluminum and uses a unique 18 spoke super strong design to help eliminate flex. Fits most popular 3-pc chromoly cranksets.
Features:
- CNC Machined from 6061 Aluminum
- The Imperial is "Bolt on" Style and Requires a Sprocket Bolt to be Attached to the Crank Arm
- Available for 19mm Axles Only
- Supplied with 19mm Silver Steel Insert
- Made in the USA
Specifications:
Teeth: 3/32"Bore: 7/8"
Thickness: -
Adapter:19mm Included
Weight: 4.06 oz
This product is expected to become available for purchase on Sunday, July 2, 2023
William Irvin
Verified Owner
Wednesday, Sep 28 2022 (8 months ago)
Profile Racing Imperial Sprocket (Black) (44T)
Great quality and made to last. The paint is very well done and it looks great.
PD
Verified Owner
Tuesday, Apr 26 2022 (about a year ago)
Profile Racing Imperial Sprocket (Black) (23T)
Three complaints.
Too expensive. I simply wanted a 23t sprocket and Profile's the only one available. It's an industry problem: 25/9 isn't suitable for everyone (and I'm a 195lb adult and not some skinny kid). Wish I had other options besides one expensive offering from Profile.
Narrow and made for 3/32 chain. It'll wear quicker than a 1/8 chain sprocket. Considering this size is never used on a race bmx I don't know why this - and anything up to 25t - can't be the thicker size.
22/19 adapter was an INTERFERENCE fit with the sprocket. Luckily I have a 20 ton hydraulic press, and that's exactly how I got the adapter on. Never had issues with other sprockets and adapters. Started with a hammer and wood blocks and got adapter 1/3 on. At this point, NO further hammering, or using of screw clamps would've sufficed. The hydraulic press was ABSOLUTELY ESSENTIAL. Freezing the adapter and heating the sprocket might've worked for using a hammer, but c'mon, this is ridiculous. Who should have to do that? And btw I'm a certified motorcycle tech and have done lots of bearing replacements and know about fitting parts and no, the adapter wasn't cocked in the hole as I was installing it.
Upshot is that sprocket is extremely precise with NO variance in chain tension when cycling the pedals.
Unless you have a hydraulic press and/or Profile fixes the adapter fit do not buy this sprocket if you have a 19mm bb spindle and need to use the adapter.
Too expensive. I simply wanted a 23t sprocket and Profile's the only one available. It's an industry problem: 25/9 isn't suitable for everyone (and I'm a 195lb adult and not some skinny kid). Wish I had other options besides one expensive offering from Profile.
Narrow and made for 3/32 chain. It'll wear quicker than a 1/8 chain sprocket. Considering this size is never used on a race bmx I don't know why this - and anything up to 25t - can't be the thicker size.
22/19 adapter was an INTERFERENCE fit with the sprocket. Luckily I have a 20 ton hydraulic press, and that's exactly how I got the adapter on. Never had issues with other sprockets and adapters. Started with a hammer and wood blocks and got adapter 1/3 on. At this point, NO further hammering, or using of screw clamps would've sufficed. The hydraulic press was ABSOLUTELY ESSENTIAL. Freezing the adapter and heating the sprocket might've worked for using a hammer, but c'mon, this is ridiculous. Who should have to do that? And btw I'm a certified motorcycle tech and have done lots of bearing replacements and know about fitting parts and no, the adapter wasn't cocked in the hole as I was installing it.
Upshot is that sprocket is extremely precise with NO variance in chain tension when cycling the pedals.
Unless you have a hydraulic press and/or Profile fixes the adapter fit do not buy this sprocket if you have a 19mm bb spindle and need to use the adapter.