They are solid, at least at the pedal end, and you are able to shorten them to 152mm. I can’t remember why that exact number but there is an engineering company in the UK that will drill and thread them for you. I have to say it’s such a huge improvement for a kid it’s worth every penny
I don’t think that image thing worked so here’s a link:
[https://imgur.com/O9ESFUF](https://imgur.com/O9ESFUF)
April 14, 2021, 10 a.m. - papa44
They are solid, at least at the pedal end, and you are able to shorten them to 152mm. I can’t remember why that exact number but there is an engineering company in the UK that will drill and thread them for you. I have to say it’s such a huge improvement for a kid it’s worth every penny  I don’t think that image thing worked so here’s a link: [https://imgur.com/O9ESFUF](https://imgur.com/O9ESFUF)