The main difference between the RCH 45 and RCH 55 is the flex. The RCH 45 offers Senior and Regular flex and the RCH 55 offers Regular and Stiff flex. So the Senior flex with the RCH 45 is better for players with below average swing speeds and the Stiff flex with the RCH 55 is better for players with faster swing speeds.
| Callaway RCH 45 | Callaway RCH 55 | |
| Flex | Senior, Regular | Regular, Stiff |
| Length | 46 inches | 46 inches |
| Material | Graphite | Graphite |
| USGA Legal | Yes | Yes |
Flex: Callaway RCH 45 vs RCH 55
The first difference between the RCH 45 and RCH 55 is their flex options. The RCH 45 has 2 options, those being senior and regular, and the RCH 55 also has 2 options, those being regular and stiff. They both share the regular flex option, but the other flex options they have are different.
The senior flex offered by the RCH 45 is better for players with slower swing speeds. In other words, senior flex is better for those who have below average swing speeds. The RCH 55 has stiff flex, which is better for players with above average swing speeds. If you are looking for regular flex, then either of these will be good for you, however, if you are looking for flex options that aren’t regular flex, then you must choose between these two.
Length: Callaway RCH 45 vs RCH 55
Both the RCH 45 and RCH 55 are 46 inches in length. This is considered to be quite long in comparison to other clubs on the market. Generally speaking, longer clubs are better for intermediate and expert golfers. Longer clubs are harder to square on impact which make them difficult for beginners to use them.
Believe it or not, the USGA has rules on club length. A club is only allowed to be 46 inches long. Anything longer than that and the club is considered illegal. Neither the RCH 45 nor the RCH 55 breach this length, so they are both considered legal to use.
Material: Callaway RCH 45 vs RCH 55
Another spec to look at is material. While material doesn’t play a huge role in most decisions, it is still something to note. Both the RCH 45 and RCH 55 are made from graphite. Graphite is quite light, which means that these clubs are built to be swung at high speeds.
USGA Legal: RCH 45 vs RCH 55
It is important to know whether or not the club you are looking at is legal. As mentioned above, the USGA has very strict rules on what equipment is allowed. According to the USGA, both the RCH 45 and RCH 55 are considered legal to use in any casual, high-level amateur, and professional golf outings.