Does anyone know about how heavy the following locks are (and comparisons among them) (U-lock alone, without the cable or bracket)?
1.
Kryptonite Kryptolok Series 2 ATB Bicycle U-Lock (5-Inch x 9-Inch)

2.
Kryptonite Kryptolok Series 2 Standard Bicycle U-Lock with Transit FlexFrame Bracket (4-inch x 9-inch)

3.
Kryptonite Kryptolok Series 2 LS Bicycle U-Lock (4-Inch x 11.5-Inch)

In the customer reviews, #2 gets more complaints about the weight than #1, which is surprising, since #1 is wider than #2. ???

Thanks in advance.