BROMPTON Piñon 13T set incl disco 3/32' 9-spline - (BWR as a 3-spd)
https://www.bike-tech.com/shop/q101614-brompton-pinon-13t-set-incl-disco-3-32-9-spline-bwr-as-a-3-spd-10643
https://www.bike-tech.com/web/image/product.template/10643/image_1920?unique=9308331
Piñon 13T para montaje en buje BWR