Bike rental Seville

Hi Warmshowers Community

My husband and I plan to ride on the TransAndalus trail for three weeks in April/May 2019. We want to rent bikes in Seville suitable for the trail. Can anyone recommend a good bike rental company with reasonably cheap rates? Alternatively, is there a shop selling good second-hand bikes where we could buy and then sell back once we have finished? 

Any other advice about the TransAndalus is also welcome. What, in your opinion, are the highlights?

Thanks, Helen and Richard from NZ