If you're a UK taxpayer, then yes - and please do! It means The Bike Project can claim an extra 25p for every £1 you donate, at no additional cost to you.
Simply click the tick box on the product page (above the 'Add to Cart' button) to show that you have read the following Gift Aid declaration:
I am a UK taxpayer and understand that if I pay less Income Tax and / or Capital Gains Tax in the current tax year than the amount of Gift Aid claimed on all my donations it is my responsibility to pay any difference.
We'll do the rest!