Minion

That's their crash replacement policy. For normal defects, the warranty is one year.

I don't think that's the case. I chucked my ride from GC into Excel and calculated the average, ignoring zeros. It went from 65rpm to 85rpm. I suspect it's more likely to do with how the handle auto-pause i.e. actual gaps in the file where there's no time or any other data recorded.

You mean they're not for resting .

I forgot, the hills only go up where you are.

Their prices on new PTs are also comparable to normal prices from CRC etc.

Are you using auto-pause? Can you upload the .tcx file here? Plug your 705 into you PC and find the 'Garmin/History' folder (I think). The files are named according to data and time. You may have to zip it to upload it here.

I don't think it's that low. If he spent 15% freewheeling, 15% climbing at 70rpm and the rest at 90rpm, his average would be 65rpm.

Have you tried uploading the data to Garmin Connect? GTC is not the most well-regarded of software packages.

I've ordered from Evans Cycles with mixed results: I ordered a stem that was sent via Royal Mail, but was incorrect. They sent a replacement via Royal Mail that got lost. They didn't have a tracking number, so they sent another replacement which arrived. All took about two weeks to arrive. I ordered a crank that arrived via Royal Mail, but it was the wrong one. I sent it back and after a number of stuff-ups on their side, eventually got a refund and a goodwill voucher. I've also had stuff sent to the UK and bought from them in-store. I think they send the lower value free stuff via Royal Mail and the higher value stuff via Parcelforce etc. I suspect your address won't be too much of a problem: the postal code will get it to the right Post Office and the postman their probably knows the area well enough to know where your office park is.

I think it might also relate to whether or not you use auto-pause on the device. I don't use it - I feel my Garmin should be tracking every second of my ride - and I get the same average values in GC, Mapmyride and ST: What's interesting is the distance value. The true distance is closer to 39.4km. I deliberately set the wheel size for my GSC10 sensor about 15% smaller. This shows that the speed sensor takes precedence over GPS values when calculating speed and distance. If you tell Sporttracks to calculate the values, it uses the GPS track to give the true speed and distance: This can be useful to determine whether your wheel size is correct. PS. I can't see your Mapmyride file - its security setting is set to private.

It depends what you're looking for. I personally think the Sporttracks method is more accurate: I want a record of every single second of my training. Just because I'm stopped at a traffic light, doesn't mean it's not having some effect (in this case recovery).

I've just downloaded the Open MTB Maps and played with them in Garmin Basecamp. There do appear to be named, route-able trails for Van Gaalens, including Greek Church, so it may be a viable option. There're also large numbers of unnamed trails. It's easy enough to download it and check for yourself.

I'd vote for that.

I spend 95% of my time on the road, so no. Just throwing out alternatives. Someone who MTBs more than I do may have tried out the maps.

Probably. On the other hand, poor grammar and spelling can seriously detract from whatever message the writer is trying to convey.

The free maps from www.openmtbmaps.org seem to have maps of our local trails. My 2009 Topo & Rec maps from Garmap also have trails and walking paths mapped: You can also create custom maps for the Edge 800 from scanned images.

This makes sense, since most bridge/tunnel/subway sections are straight. The GPS gets points at the entrance and exit and then just draws a straight line between them.

Will the program also support the older, XML-based .tcx files from Edge 705s etc.?

It might just be the BB threads. You can remove it, clean it and the put grease, Loctite or thread tape (depending on what the manual says) on the threads before reinstalling it.

That's a pretty cool calculator. Edit: I've sent Capricorn a PM to see if he'll include it in the first post

They're different sources of error, though. A lot of the time, the difference (it's not really an error) is due to the smoothing used. The Garmin data I used for comparison came from a unit with a barometric altimeter. Here's a good article on GPS elevation problems: http://www.dcrainmaker.com/2010/05/understanding-sport-device-gps.html I would summarise by saying that if you see different ascent values, depending on the program used to display them, then it's due to smoothing errors. If you see wildly different ascent and descent values in the same program for a ride starting and stopping in the same place, then it's probably an accuracy issue.

I suppose it's all a compromise - you don't want noisy data to to mess up the ascent values, but you also don't want to lose actual ascents in the smoothing. It also depends on what you'd call an ascent. If you drive up a 10m elevation, is that a 10m ascent? What about a 5m elevation or a 1m elevation? What happens if it takes you 100m to go up the 10m or if it takes 1000m? I'm not too concerned about total ascent, but if you use a program like Sport Tracks then you can change the level of smoothing until you get ascent values that you think make sense.

It's been discussed a number of times before. It's mainly to do with the algorithm that the device or software uses to smooth the data, not so much the accuracy of the sensor. As an example, using the same data file from my Garmin, for the same ride, I can get ascent values varying from 500m to 1000m, depending on which software I load it into and which settings I use.

Suunto use the older ANT communication protocol, while Polar has it's own communications method. To use an ANT+ computer, the fitness device needs to transmit an ANT+ signal (only newer ones tend to do this) and the computer needs to be set up for the 'Fitness Device' ANT+ profile. Here's a not so up to date list of ANT+ fitness devices: http://www.thisisant.com/modules/mod_product-directory.php?t=search

I recall there being a fairly comprehensive thread about this a few months ago. Maybe try a search for 'Powertap' or something like that.