There are some excellent bike shops in Portugal but – particularly in smaller towns – they leave something to be desired. Bigger towns might have a decent shop but elsewhere you can be hard-pressed to find much of a range of bike parts and spares.
If you need anything specialised – for examples tyres other than basic Michelin models – you’d be best advised to bring spares with you.
If you’re in Portugal for any length of time and urgently need a new part for your bike, online UK companies like Chain Reaction and Wiggle will deliver to Portugal. It only takes a few days to get kit sent out – and you may well get a better price than buying in Portugal anyway.
I have begun to develop a listing for Bike Shops & Mechanics in Portugal – mostly those recommended by other cyclists. However, this is still at an early stage (February 2014).
If any riders have discovered a good bike shop or mechanic in Portugal, please share the information and post recommendations below. Thanks.