Hi stevej
Not entirely clear to me which insert(s) are in play here, sorry...
The speed fin attaches to the bike via three M4 bolts: the forward bolt goes into the frame directly via an M4 riv-nut (aka nut-sert)...the rear bolts are threaded into the brake arm posts, also M4 threads. See page 31 in the service manual, figures 11.10-11.11. Neither the nut-sert nor the brake posts are available as service parts. The nut-sert could be replaced, but it's not something I'd recommend for most DIYers...better to find a shop which has experience with that repair (it's the same basic thing as a water bottle bolt insert in your frame...just one size smaller).
The rear brake as a unit is attached to the frame via a pair of M6 bolts (page 29, figure 11.3), and the M6 inserts in the frame are co-molded items...not replaceable.
Carl Matson
Not entirely clear to me which insert(s) are in play here, sorry...
The speed fin attaches to the bike via three M4 bolts: the forward bolt goes into the frame directly via an M4 riv-nut (aka nut-sert)...the rear bolts are threaded into the brake arm posts, also M4 threads. See page 31 in the service manual, figures 11.10-11.11. Neither the nut-sert nor the brake posts are available as service parts. The nut-sert could be replaced, but it's not something I'd recommend for most DIYers...better to find a shop which has experience with that repair (it's the same basic thing as a water bottle bolt insert in your frame...just one size smaller).
The rear brake as a unit is attached to the frame via a pair of M6 bolts (page 29, figure 11.3), and the M6 inserts in the frame are co-molded items...not replaceable.
Carl Matson