Control system, straddle type vehicle, control method, and storage medium

A control system of a straddle type vehicle, comprising:

• at least one processor with a memory comprising instructions, that when executed by the at least one processor, cause the at least one processor to:
• estimate a second force acting on a rear wheel of the straddle type vehicle from an obstacle, on a basis of a first force acting on a front wheel of the straddle type vehicle from the obstacle;
• and
• control a rear suspension mechanism configured to support the rear wheel, on a basis of an estimation result for the second force, when the rear wheel is affected by the obstacle,
• wherein the at least one processor is configured to estimate, as the second force, a force converted from the first force according to a difference in a state of the straddle type vehicle between when the front wheel is affected by the obstacle and when the rear wheel is affected by the obstacle.