Hi There,
As it happens I have just taken the plunge and ordered the C8 at sale price (less another 10%).
Never ridden one, never seen one (exept photo) just relied on excellent reviews.
Any tips or info that I might find useful will be gratefully recieved (PM me if you like).
Steve (Flatbat)
Congratulations !
1st off - you're going to love the bike. If you haven't ridden with the Impulse system or hub gears before then give yourself some time to get acclimatised. Once you're used to the gears and get your timing right for changes to optimize assistance from the motor, they are simply incredible. You'll never want to go back to derailleurs again and it's as smooth as driving a car. It took me a few weeks to really crack the gear changing. A few hundred miles on, I can get the bike to ride like a racing bike with silky smooth changes or tease out maximum motor power on tough climbs as required.
Make sure there's enough chain tension all the time and that the gears are tuned and brakes checked after the first 100 miles or so. A loss of chain tension can cause the gears to slip (took me ages to work this out) so if you keep your wheel correctly adjusted the bike will ride like a dream. You take up the tension in the chain by having the wheel correctly located in the dropouts (turn the bike upside down and pull the wheel towards you in the dropouts - hard if necessary - before tightening, and make sure the brakes stay in alignment when you tighten up the nuts to set the wheel).
Getting your cadence right really helps optimize output from the motor. There is much focusing on the initial delay with this Impulse system. It's actually barely noticeable and provided you don't pedal too hard (actually counter-productive - you can wind up with pedal spin if the gear is too low), the motor assist it lively. Also don't try to start in too low a gear on flat or moderate inclines. You can probably be in about 4th gear up (6th on mine) in most situations for best results.
I've eventually learned that it's best to let the motor assist really "deliver" before changing up. When you do change, ease off the pedals (you don't have to pedal to change gear with hub gears and can change at will whether stationary or whilst riding), change gear and then re-commence pedalling at about the same cadence as before or slightly harder. This approach seems to smooth out all the "ups and downs". It feels a bit like driving a car - easing off pedal rotation being like depressing the clutch before changing gear and then accelerating. I tried to imagine I was driving a limo with a VIP in the back seat and wanted the ride to be as comfortable as possible. This led to smooth gear changes and ultimately I got so much more from the motor too.
Be quite gentle on the pedals on short hills and drop your gearing. The motor will really fly you up there.
Hope you love your bike as much as I love mine. It gets asked about on a regular basis when I park it up in town.
One last Agattu quirk - the tyres come with inner tubes that have the old "Dunlop" valves on them. They usually send you a basic hand pump which fits but a lot of the better pumps and foot pumps these days are not compatible. First time you do anything with the tyres that needs a foot-pump I'd change them and fit ones with Schrader valves instead.
The stock tyres are OK for a few rides but I'd invest in some nice ones (especially if you saved money on the bike).
I'm running Continental Top Contact Winter IIs on mine at the moment (which despite being Winters have been the best ride of all). I've taken corners hard in minus 5 degrees with them at 15-17mph with a significant lean and they gave good grip. Tend to lean less in the wet for safety's sake but they are pretty happy on mild days too. Touch wood no punctures yet either.
Previously was running regular Schwalbe Marathon Plus Tours and felt slightly more rolling resistance than with the Winter Contis, but they are amazing tyres and very puncture resistant. I'll put them back on in March/April. Fitting them is tough but that's far better than having tyres on and off for puncture management on a regular basis. I recommend these inner tubes too. They add a bit of weight but you won't want to mend a puncture at the roadside if the worst happened - and they will most likely get you home :
Michelin Protek Max Inner Tube 700x32/42C - Inner Tubes - ACYCLES
Hope that's of some help / interest.