Sram pg-720 a1 vs sram pg-720 a2 slim ?

PB Forum :: SRAM

Author	Message

ka81

Posted: Feb 22, 2026 at 13:30	Quote
anyone knows the difference between: sram pg-720 A1 https://www.sram.com/en/sram/models/cs-pg-720-a1 sram pg-720 A2 (Slim) https://www.sram.com/en/sram/models/cs-pg-720-a2 ?

BenLow2019

Posted: Feb 23, 2026 at 8:46

Quote

The 'slim' doesn't have a spacer so it fits on certain HG hubs? Also, it appears that this model is only used on complete bikes - can't buy it retail.

From the product page:

Remove the spacer to fit “slim” 7-speed DH specific HG hubs.
Some variations of this product featured on this page are not available for purchase and are installed on bicycles as complete bikes only. See your dealer for details.

rimdestroyer

O+

Posted: Feb 23, 2026 at 14:24

Quote

ka81 wrote:

anyone knows the difference between:
sram pg-720 A1 https://www.sram.com/en/sram/models/cs-pg-720-a1
sram pg-720 A2 (Slim) https://www.sram.com/en/sram/models/cs-pg-720-a2
?

The difference is basically weight and finish, the PG-720 A2 (“Slim”) is a slightly lighter, slightly sleeker version of the same cassette compared to the A1. They shift and function the same, just the A2 shaves a tiny bit of metal/weight and usually has a bit cleaner look. Performance isn’t noticeably different.

ka81

Posted: Feb 24, 2026 at 12:29

Quote

BenLow2019 wrote:

can't buy it retail.

https://www.bike24.com/p2984651.html

BenLow2019

Posted: Feb 24, 2026 at 15:27

Quote

ka81 wrote:

BenLow2019 wrote:

can't buy it retail.

https://www.bike24.com/p2984651.html

That site says "Notify when available". I surprised it's even listed.
I guess the SRAM website was wrong. Have fun with the cassette.

All things considered, you can just get the other one and remove the spacer if that's what you really need.

ka81

Posted: Feb 25, 2026 at 3:49	Quote
i'm considering of buying 7sp transmission, and so .. - sram it is. but which one? btw, whats the diffetence between pg-720 and xg-795 x01 ? hg vs xd, 11-25 vs 11-11-24, 224gr vs 134gr. anything really important more ?..

BenLow2019

Posted: Feb 25, 2026 at 6:51

Quote

ka81 wrote:

i'm considering of buying 7sp transmission, and so .. - sram it is.
but which one?

btw, whats the diffetence between pg-720 and xg-795 x01 ?
hg vs xd, 11-25 vs 11-11-24, 224gr vs 134gr. anything really important more ?..

Price is something to consider - the XG-795 is a really expensive, machined steel block of gears with the whole X DOME thing that supposed to be an integrated spoke protector.
Here's a good review of the drivetrain - the cassette is shown and discussed.
LINK

terrasmak

Posted: Feb 26, 2026 at 10:42	Quote
Who will make the first hub available for the slim ? I’m thinking EThirteen , they had an HG slim to run the GX cassette without the spacer

ka81

Posted: Feb 26, 2026 at 21:00

Quote

BenLow2019 wrote:

ka81 wrote:

anything else except the price? even if there's a tiny little (but useful) difference, what is it?

jake1205

Posted: Feb 26, 2026 at 23:03

Quote

ka81 wrote:

anyone knows the difference between:
sram pg-720 A1 https://www.sram.com/en/sram/models/cs-pg-720-a1
sram pg-720 A2 (Slim) https://www.sram.com/en/sram/models/cs-pg-720-a2
?

Pretty much the same, man, the A2 “Slim” is just a narrower version for better clearance. Performance-wise, no real difference.

ka81

Posted: May 1, 2026 at 8:35	Quote
Got CS-XG-795-A1 https://www.sram.com/en/sram/models/cs-xg-795-a1 and RD-X0-1DH-A3 https://www.sram.com/en/sram/models/rd-x0-1dh-a3 they say it works with 11 sp chains. Any other chains to fit that combo ?? I see many 6/7/8 sp cins in bike stores....

loamwoods

Posted: May 1, 2026 at 14:08

Quote

ka81 wrote:

Got CS-XG-795-A1
Any other chains to fit that combo ?? I see many 6/7/8 sp cins in bike stores....

yeah don’t overthink it

that setup (XG-795 + X0 DH mech) is made to run 11-speed chains, even if it’s a 7-speed cassette

so just run:

any SRAM 11s chain (PC1110, PC1130, PC1170, etc)
or Shimano / KMC 11s, they’ll work too

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