Bike Maintenance:
Basic level maintenance facilities and bike parking are available onsite at Gweek Campsite ...(just ask). Otherwise there are some bike business in Helston see links below:
www.thebikefairy.co.uk/
www.lakesidecycles.co.uk/
www.giant-helston.co.uk/gb
Local bike hire options:
Shipyard cycles in Porthleven: 07462 411664 .
Lizard bike hire: 07951 934 604 (they also bring/collect bikes to campsite for a fee£).
Lakeside Cycles in Helston: https://lakesidecycles.co.uk/
For a Useful cycle route planner, see these websites:
https://www.komoot.com/
https://www.alltrails.com/
https://www.cyclinguk.org/journey-planner
https://experience.cyclinguk.org/cornwall