do you think I can cycle 100 miles this weekend?

Furthest ive ridden is 70 miles about 1 month ago. Done 55 last weekend and 50 (solo) the weekend before that.

How many miles did you do before jumping to 100?

In less than 4 hours? No. In 10? Yes.

If you can ride 70 you can ride 100.

^ and ^^ - what they said

will have a think if I can avg a decent enough speed that I dont slow down the guy im riding with and go for it then..

How old are you? How fit are you? Do you suffer from any physical impairments?

Any reasonably fit person under the age of 80 is capable of riding 100 miles or more.

The one thing that might stop you is your statement "if I can avg a decent enough speed that I don't slow down the guy im riding with" [from that statement I would guess you are not over 80 and probably not over 30]

You need to pace yourself and not take someone else's pace. You should end the ride at the same pace that you start it at, or rather start at the pace you intend to finish. Keep your heart rate low. Gauge this by speaking. If you can hold a conversation: good. If not, slow down. If you have no one to speak to, sing. A pace with a low enough heart rate can be maintained for a long time.

Take plenty of water, refill when necessary. You should get through around 6 750ml bidons on a 100 mile ride depending on the weather. Eat and drink before you leave. Take food.

If a fat old man like me can ride 100 or more miles with ease, you should have no trouble.

I recently did 90 miles(fixed) which is the most i done yet, took me 7.5 hours with rest stops and a lot of steep hills, i really struggled on the last 30, i should of slowed my pace from the start, and took more food, I just ran out of energy, i was just running on fumes and heavy metal.

next time i'd take plenty of food, as much as i can carry.

I think I'd ridden 70 miles before my first 100+ mile ride (125 miles in the end). It was just a longer day in the saddle.

As others have said, it's all about pacing, fueling and staying hydrated. The more long rides you do the more you'll understand how your body (and head) reacts/works and what it needs to keep going.

Eat little and often, drink plenty of water, you'll be fine. It's all about making sure you're refuelling regularly. First time I did 120miles I hadn't done anything longer than 50 before that.

Wheelsuck your buddy

Be prepared for a (mental) low point. You may wonder why you're doing this and may want to give up.

I usually get this at 60-70% distance and it can be easy to give in to (especially if you're on your own). I've now learned to push on for an hour and then re-assess by which point I'm usually feeling much chirpier and will carry on to the finish.

have you got a specific route? Could you perhaps plan a route that circles your local area so you are never too far from home if you burn out?

I used to do this when training distance running when pushing the boundaries. run out and back a distance I could do then loop the last part and hit the mile marker then crawl home.

@Greenbank I tend only to get the mental dip if I'm bonking. If I'm eating enough I feel pretty chirpy.

I did say "may".

Mine is consistently around 60-70% distance and nothing to do with energy levels. Doesn't matter if it's a 100km, 200km, 300km or 400km ride. Longer rides (600km/1000km/1200km/1400km) are multi-day rides and my mental state ebbs and flows differently on those. Riding in the early hours (3-5am) is the usual, unsurprising, low point but the sun coming up usually fixes it. There can also be a low around sunset, it depends on how much riding I've got before I know I can have a nap.

Eat regularly, sit on his wheel except when going up hill (ride these at your own speed) and let them wait at the top. If he is buddy he will adjust pace to make sure you don't blow up.

A loop with a shortcut / bail out point home is useful if you do blow up but 1oo is very doable.

I typically attack at the 65-70% distance :)

The dawn during a 24hr sucks. I never get the "ooh sunrise" feel good shit everyone else seems to report. It's always "oh fuck, I still have 8 hours to go".

Im much quicker up hills than him but reckon he has me on the flat/ endurance.

Its this: http://www.ipswichcyclingweekend.co.uk/crafted-classique

fairly flat, though put it into ridewithgps and it seems to be up down up down all day but nothing over 3%.

A wise old clubman I knows says "if you can do it cumulatively in a week you can do it in oner on the day".

Seems to work for me.

If you have no one to speak to, sing.

This.
Totally, all the way this.

When i did the Paris Roubaix sportive a few years ago, the best bit, apart from arriving at the velodrome, was being passed by Belgian and Basque clubs, riding and singing. Absolutely wonderful.

On the London to Brussels a couple of years ago we led a stirring round of Bowies Ch-ch-ch-changes in 3 part harmony.
Ace.

What's the total altitude gain? I think this is more relevant than distance.

I got my mate to do the dynamo last year. In a month he went from being tired on a 5 miler around town to riding out the whole night, 120 miles.

The main problem he suffered from was knee pain. Expect to eat and drink a lot, bring plenty of carbs and salt if you're nervous.

That route is pretty flat, which can be a problem if you hit a too high pace on the flat.

Gears, Flat terrain, first long distance I would hope for 6 to 7 hours.

Repped

4000ft

so I did 30 miles last night, how many should I do thursday? intensity? (rides on saturday)