Can you download maps onto a Garmin GPS for a bike.

If you want a UK OSM Map with Cycle paths and routable, then I followed the OSM wiki and created one. So if you want a UK OSM including Cycle Paths - current as of Jan 2013 then download from here

https://sites.google.com/site/openstreetmapgarmincycleuk/

One good option for Garmin maps for the UK is Andy Gates' Munky map.

Just download the file OSM-Garmin-Munky-UKIE.zip, then unzip it, and copy the gmapsupp.img file to a folder named "Garmin" on the MicroSD card.

These maps are for all of the UK and Ireland, and include contour lines and support routing. These maps have a customised style, which uses standard UK colours for roads etc, plus they highlight some things which are useful for cyclists, eg cycleways and bike shops.

The answer is yes. Go to http://talkytoaster.info/ukmaps.htm and read carefully. The appropriate file can be downloaded, renamed and loaded onto your micro sd card in a folder called Garmin. Insert in GPSr and away you go. As to whether its any good for cycling - probably only as good as any other map.