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  1. Spa_5_Fitness_Camp on

    Rival will be easier to upgrade individual parts to Force or Red. You can even add a power meter to the crank easily, or if you want different chain ring sizes get the Force one with built in power meter at the same time. The wheel upgrade is far larger than the group set downgrade, IMO. Also, the only real difference between Rival/105 and Force/Ultegra is weight, which 99% of riders dont notice when riding.

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