Sun Company Clip-On Compass for Bikes | Handlebar Compass for Bicycle, Motorcycle, ATV, or Snowmobile

The numbers are very small

I bought this because the trails I ride on snake through the woods and there are many forks. I was getting totally lost because I have trouble remembering all turns at all the different forks in the trail. First ride I noticed that this compass seemed to pointing the wrong way and it caused me to take the wrong trail out of the woods and I ended up in the wrong place. Once I got back on the streets I could really tell it was way off, it was showing north as south. I turned west and it was still pointing south. When I got home I took it off the bike and it started pointing true north again. At first I though maybe some metal on my bike was throwing it off but that was not the problem, It only works if it is perfectly flat, which is never the case when its strapped to the handle bars of a bike. Even to tilt it back a little so you can see it at an angle causes the floating thing to hang up or stick so it doesn't register the change in direction at all. It will work if you take it off and hold it steady while you are sitting still, but not while you are riding, and that totally defeats the purpose of having it on your handle bars, you might as well just stop and pull a compass out of your pocket. I need something that I can look at while I am riding, so I know what direction I'm going after I take a different fork in the trail and this will not work.

Grip is perfect, size is perfect, no complaints!

Works great if you understand the limitations of a flat compass. It would work better if it was a ball style but then it wouldn't be so unobtrusive. Mount it parallel to the ground and it will work on mild gradients. The only issue I had was that the housing would rotate on the handle bars. A couple of drops of silicone between the compass and the bars stopped the rotation.

I like the size and convenience, its accuracy is affected by the proximity to my bike computer. I will have to find a different mounting spot

Works as well as a compass can work. Before buying it, I verified my handlebars were non-magnetic (ie aluminum not steel) by using a magnet. Don't expect this to work near ferrous materials. This compass already has a little round rubber pad glued under the compass that holds it in place on 1" bars. It also includes a separate C-shaped rubber ring that needs to be used on 7/8" bars to keep it from sliding around. It's not rated for bars larger than 1", although it might stretch enough to fit up to 1-1/4" bars. Using the C-shaped ring holds it nice and tight on the 7/8" portion of my riser bars.In use, keep in mind its a compass and suffers from all the typical compass problems, including magnetic dip and acceleration and turning errors. You pilots will understand. In a nutshell, the compass will read erratically while turning and during sudden accelerations/decelerations (eg bumps and potholes). Straight and level, it works fine provided there are no stray magnetic fields (deviation) about. Keep variation in mind as well (the difference between true and magnetic north). It's a compass, not a GPS unit.The compass has an arrow and the letter N for North, letters for E, S, and W, and smaller letters for the intercardinal directions NW, NE, SE, and SW. The only odd thing is that there are three lines between the cardinal and intercardinal directions, in other words four divisions each 45 degrees. That's 11.25 degrees per mark. Just one line (for the secondary intercardinals SSW etc) or two lines (ie every integer 15 degrees) would have made more sense for a compass. Oh well...minor nit. It does a fine job showing me my general direction of travel, with no batteries required.

Put it on my motorcycle and it loses accuracy over 10 miles an hour. Also very small and hard to read at a glance

seems to be stuck when on the handlebars, I have it on my electric bike so EMF interference? same as the one i bought for my truck, put on the dash and it fails to work correctly.