bigsmile said:I think my question can be better put like this: When people talk about paces like 20 mph, are these instantaneous readings from bicycle computer/smart phone, or average speed based on total time and distance traveled. The former method would excluded stops and slows, and the latter would include.
The question is relevant because I'm thinking of joining some local group. They have these mph numbers for their rides, and I want to know if I can keep up with them.
I think it's probably easier to keep speed on the road than on trail. I feel that I have to slow down for over half of the distance for various reasons. I consider I'm still not experienced, so I tend to be cautious at curves (which the trail has so many of) and when passing (either pedestrians or other cyclists).
Group ride targets are generally assumed to be the average "moving speed" during and overall for the ride. Some peg a single number 20mph - most target a range like 18-20mph or 20-22mph.
To ride successfully with a group, you'll need to understand all of the ride objectives - speed, distance/ride-time, and "drop" policy.
- Speed: you can typically average 1-3mph faster in a group (paceline) than riding on your own. Riding in the slipstream of riders in front of you takes significantly less energy than pushing through the air to create the slipstream. If you can comfortably ride at 18mph on your own, you can probably "sit in" a paceline and ride at a pace of 20mph (maybe up to 22/23 on flat land ) for extended periods. If you're required to take a turn at the front of the paceline and can't keep the pace going, you may catch some flak if you're clearly disrupting the objectives of the group. Some groups expect all members to rotate to the front and "pull" when it's their turn - others groups just want to maintain the pace goal and don't mind if a few riders tag along, in which case the stronger riders do all the pulling.
- Distance/ride-time: groups usually have a target for the length of the ride - either a specific distance or for a length of time. Given a target pace and length of time gives you an idea of how far the group is going to ride. Longer rides may or may not include a break. A group targeting 18-20 for 2.5 hours may stop around 1.5 hours in for a 10 min break, or they may not. In the first case you need to be able to comfortably ride ~30 miles or so without stopping. In the second case you should be prepared to ride ~50 miles non-stop.
- Drop policy: rides usually have a group objective - either to keep everyone together, make adjustments to integrate different abilities, or know your way home. "No-drop" means the group will ride to the ability of the weakest rider(s) - flat land speed will be adjusted to avoid breaks in the paceline and the group will slow on hills to allow weaker riders to stay with the group, or the group will slow after the top and wait for all to rejoin before returning to the target pace. "Regroup" means the stronger riders will ride ahead at the target pace if breaks in the paceline develop and pick a few predetermined or logical places to stop and wait for the rest of the group to catch up. "Drop ride" means you need to know how to get home on your own.
Good luck.. Have fun!