Strength training exercises with adjustable dumbbells

This will likely go against what you’ve read or heard: increase your reps. You’ll get more pedaling power being able to squat 200 lbs 15 times than 225 lbs 5 times. Heavy weight x higher reps is better than heavier weight x low reps. Alternatively you could take 5 months to move your 225 to 15 reps but that’s gonna ruin your summer riding. Expect significant difficulty pedaling until you allow for a recovery week this kind of strength training will trash your legs in the short term.