Tandem Samedi 27 x2 TRK
BOSCH Performance CX 1000 Wh !
Wow, that’s not so stupid! It’s a great idea, to increase and combine effort, or when the two riders do not have the same level of fitness, with children, with a trailer, to go further, to bomb uphill (because everyone knows that a tandem… it bombs along especially on the flat).
1st challenge: the motor...
Put it at the front, easy… but it’s impossible to synchronize the cranks due to the motor freewheel… so, forget that if you want to maintain a decent ride. Therefore we decided to put it at the rear… but we had to innovate! So we created a unique interface and special cranks to link the front and rear cranksets despite the motor being at the back.
2nd challenge: the stiffness!
Fortunately we already have our triple cavity tubes that have made our task easier!
3rd challenge: the range.
And for this we can thanks Bosch who have developed a «Y» «DualBattery» wire to safely connect 2 batteries in order to get an incredible capacity of 1000 Wh! The system intelligently manages power between the two batteries during charging and discharging, which increases their lifetime.
|User (estimated fitting size)||1,55 - 1,80 m||1,80 - 1,95 m|
|Size (mm) - ST||430 (S)||480 (L)|
|Top tube (horizontal measure in mm) - TT||591||629|
|Chainstay (mm) - RC||460||460|
|Head Tube (mm) - HT||110||110|
|Wheel base (mm) - WB||1212||1251|
|Rake (mm) - FO||51||51|
|Bottom bracket (mm) - BB||357||357|
|Seat tube angle (°) - SA||74,3||74,3|
|Head angle (°) - HA||64,8||64,8|
|Size de roues AR / AV (”)||27,5 / 27,5||27,5 / 27,5|