I have tried just about every tire pressure monitoring system (TPMS) on the market on my bikes. I like the concept - a display showing my tire pressure as I ride, hopefully with settable alerts when pressure or temperature goes out of bounds. The problem is, that most of the systems I have tried are either VERY fragile, VERY difficult to install, or VERY inconsistent in performance. I really don't want to have to dismount my tires to install a TPMS. That makes it too difficult to troubleshoot problems, and deal with sensor issues. Some of the systems didn't require batteries on the wheel senders, which is nice until you find that doing so means that the pickups have to be very precisely positioned (quite an installation chore) and prone to complex calibration routines. I like the idea of a permanently mounted display but again that increases the installation complexity. Big Bike Parts sent me their new TPMS system for evaluation, and while I took a very sceptical approach, I have to say that this is the first system that has really impressed me as being easy to install, accurate, and well stocked with features. The installation just about could not be any easier - simply pop the included AAA battery into the remote receiver and set your desired alert pressures for front and rear. Install the lithium button-cell batteries into the transmitter caps, and screw them onto your valve stems (locking collars are included to dissuade theft). The senders weight only 1/3 oz each, light enough that re-balancing the wheel is not necessary. Once the sensors are installed you'll see your tire pressures instantly updated on the display. That's all there is to it! The most impressive feature to me was the accuracy that the sensors showed. I put the sensors on just about every tire on every vehicle in my shop and parking lot - not just my bikes, but even car tires, trailer tires, spare tires, etc. - and checked the reading against my trusty RoadGear digital gauge. The TPMS and the RoadGear agreed within 0.5 PSI on every tire I checked! We have had this TPMS on our in-house Gold Wing for several days now and I find it very useful. Getting a tire gauge onto the rear tire on a Wing is quite an ordeal, and I don't miss having to roll the bike forward and back and get down on my belly to check that tire. The overtemp alerts haven't triggered as yet but I like knowing that the feature is there. Since the sensors go to "sleep" to save battery life after the bike has been parked for 20 minutes, I have learned to turn the receiver on before moving the bike out of the garage. The sensors automatically power up when the bike is moved, so by the time I'm in my driveway I have the current pressure displayed. The pressure in your tires changes as you ride; as the tires heat up the pressure will rise. The TPMS seems to track this accurately, again double-checked by my trusty RoadGear gauge. As a rule of thumb I don't like to see much over a 10% rise in tire pressure - much more than that means that you're probably running your tires a little too low, and getting too much heat from rubber flexing. I normally run 40 PSI front and 42 PSI rear, so I set my high pressure alerts at 46 and 48 (about 15% over my cold pressures). My low pressure alerts are both set at 4 PSI below my cold pressures. Some things we can't test for in a short time, such as battery life and long-term reliability. Big Bike Parts claims a 1-2 year typical battery life on the transmitters, and the batteries are easily replaceable and commonly available (CR1632 lithium). The receiveris expected to give about 6 months use on a single AAA alkaline battery. I was pleased to note that the receiver has "Low Battery" indicators not only for itself, but also for each sender individually. The manufacturer tells us that they expect the components to have about a 10 year useful life, and they warrant the system for one year. Are there things I'd like to see that it doesn't have? Sure. The receiver is not waterproof, so you need to be careful riding in rain (it does, however, have a "Vibrate" feature when a pressure/temperature limit is exceeded, so you could put it in a pocket where you'd feel the vibration). I'd also like to see an audio output jack so we could wire the sound into the audio system on bikes like Gold Wings. But in terms of the really important stuff - accuracy, reliability, ease of installation, full feature set - I think they hit a home run!

Product Note: Introductory sale pricing - Big Bike Parts offered us an introductory special on our first shipment, which I'm passing along to you as a "while supplies last" introductory sale price. We will carry this product over the long term but once our initial inventory is depleted and we have to re-order, the price will go back up. Don't miss out on this special offer! Tire Pressure Monitoring System for Motorcycles - includes two valvestem cap sensors with locking collars, remote display, batteries, and installation instructions.   Reg. Price $209.95 Sale Price $179.95  Qty: # SC-TPMS2 Tire Pressure Monitoring System for Trikes - includes three valvestem cap sensors with locking collars, remote display, batteries, and installation instructions. Works for "reverse trikes" like the Can-Am Spyder and T-Rex also, the picture on the display will be backward but the system will work fine.   Reg. Price $279.95 Sale Price $239.95  Qty: # SC-TPMS3 Tire Pressure Monitoring System for Motorcycles with Trailers - includes four valvestem cap sensors with locking collars, remote display, batteries, and installation instructions.   Reg. Price $349.95 Sale Price $299.95  Qty: # SC-TPMS4