Reply To: Keep stock tyre size or upgrade? Jul 2, 2023 at 1:48 PM #10643 ♠️ M77👑 Admin Topics: 40Replies: 3,033Country: UKBike Model: GT 120/60 is OK (70 is only for 110 size) because speedo is at the forks. So use 120/60 160/60 is the maximum safe limit for the rear, so it is allowed 🙂 – Do not use 170/180+ as those people are idiots.
