Scooter rear gas shock absorbers with tank Yamaha Tricity 125-155 YSS TC302-340TL-07-85N-X with adjustable preload spring to replace the original part. The external gas tank guarantees a better cooling of the oil compared to the models with internal gas preventing the formation of bubbles and thus a more linear, precise and constant operation in all conditions. Wheelbase 340 mm, eyelet upper attachment diameter 12x16 mm, lower connection fork width 20 mm with thread M8.