Unfortunately, no - we don't have the facility to offer an alterations service. This said, we do have free returns and exchanges, so provided that the new leg length that you want is within our saleable range (whole inches between 28"-36"), we're more than happy to just exchange them for a shorter pair for you.
Fill out your exchange requests on our online returns portal, re-use the packaging that your SPOKEs came in and slap on our free post label which you'll be able to print from our portal. We'll be in touch to let you know when we've received them and when the new pair are on their way back to you. Alternatively, you can send the originals back to us for a refund and then just pop a new order through the website.