Time to Dest.: The estimated time remaining before you reachthe destination. You must be navigating for this data toappear.Time to Go: During a course, the remaining time when you areusing a time target.Time to Next: The estimated time remaining before you reachthe next waypoint in the route. You must be navigating forthis data to appear.Total Ascent: The total elevation distance ascended since thelast reset.Total Descent: The total elevation distance descended sincethe last reset.Heart Rate Zone CalculationsZone % ofMaximumHeart RatePerceived Exertion Benefits1 50–60% Relaxed, easy pace,rhythmic breathingBeginning-levelaerobic training,reduces stress2 60–70% Comfortable pace,slightly deeperbreathing, conversationpossibleBasic cardiovasculartraining, goodrecovery pace3 70–80% Moderate pace, moredifficult to holdconversationImproved aerobiccapacity, optimalcardiovascular training4 80–90% Fast pace and a bituncomfortable, breathingforcefulImproved anaerobiccapacity andthreshold, improvedspeed5 90–100% Sprinting pace,unsustainable for longperiod of time, laboredbreathingAnaerobic andmuscular endurance,increased powerWheel Size and CircumferenceYour speed sensor automatically detects your wheel size. Ifnecessary, you can manually enter your wheel circumference inthe speed sensor settings.The tire size is marked on both sides of the tire. This is not acomprehensive list. You can also measure the circumference ofyour wheel or use one of the calculators available on theinternet.Tire Size Wheel Circumference (mm)20 × 1.75 151520 × 1-3/8 161522 × 1-3/8 177022 × 1-1/2 178524 × 1 175324 × 3/4 Tubular 178524 × 1-1/8 179524 × 1.75 189024 × 1-1/4 190524 × 2.00 192524 × 2.125 196526 × 7/8 192026 × 1-1.0 191326 × 1 195226 × 1.25 195326 × 1-1/8 197026 × 1.40 200526 × 1.50 201026 × 1.75 2023Tire Size Wheel Circumference (mm)26 × 1.95 205026 × 2.00 205526 × 1-3/8 206826 × 2.10 206826 × 2.125 207026 × 2.35 208326 × 1-1/2 210026 × 3.00 217027 × 1 214527 × 1-1/8 215527 × 1-1/4 216127 × 1-3/8 216929 x 2.1 228829 x 2.2 229829 x 2.3 2326650 x 20C 1938650 x 23C 1944650 × 35A 2090650 × 38B 2105650 × 38A 2125700 × 18C 2070700 × 19C 2080700 × 20C 2086700 × 23C 2096700 × 25C 2105700C Tubular 2130700 × 28C 2136700 × 30C 2146700 × 32C 2155700 × 35C 2168700 × 38C 2180700 × 40C 2200700 × 44C 2235700 × 45C 2242700 × 47C 2268Radio Frequency ExposureThis device is a mobile transmitter and receiver that uses itsantenna to send and receive low levels of radio frequency (RF)energy for voice and data communications. The device emits RFenergy below the published limits when operating in itsmaximum output power mode and when used with Garminauthorized accessories. To comply with FCC RF exposurecompliance requirements, the device should be used in acompatible mount or as mounted per the installation instructionsonly. The device should not be used in other configurations.This device must not be co-located or operated in conjunctionwith any other transmitter or antenna.Appendix 13