| KBS Tour 90 Regular | KBS Tour 90 Stiff | |
| Flex | Regular | Stiff |
| Weight | 95 grams | 102 grams |
| Length | 36.5 inches – 40 inches | 36.5 inches – 40 inches |
| USGA Legal | Yes | Yes |
Flex: KBS Tour 90 Regular vs Stiff
The first difference between these two is the flex. The regular shaft has regular flex and the stiff shaft has stiff flex. The regular flex is better for golfers who have average swing speeds and the stiff is better for golfers who have slightly above average swing speeds. Based on your typical swing speed, one of these shafts will perform better for you than the other.
Weight: KBS Tour 90 Regular vs Stiff
Each weighs a different amount too, which also impacts performance in different ways. The regular weighs 95 grams and the stiff weighs 102 grams. The main difference with this is that the lighter shaft will be easier to generate swing speed with and the heavier shaft will be easier to control. Given that there is a 7 gram difference between the two, there will almost definitely be a difference in performance with these shafts.
Length: KBS Tour 90 Regular vs Stiff
Length is one of the similarities between these shafts. Each shaft ranges from 36.5 inches to 40 inches. This range is suitable for a wide variety of golfers. Whether you like shorter shafts or slightly longer shafts, there is likely an option for you. The USGA has a 46 inch limit on golf shafts. If a shaft exceeds this limit, then it is illegal. Neither the Tour 90 regular or stiff exceed this limit.
USGA Legal: KBS Tour 90 Regular vs Stiff
It is crucial to know whether or not these golf shafts are legal to use. The USGA has a long list of rules that must be followed. According to the USGA, both the KBS Tour 90 Regular and Stiff shafts are legal to use in any casual, high-level amateur, or professional golf games.