Giant expression

[detec52]

I have just purchased a giant expression it's in great condition and rides really well and no back ache as it's a sit bolt up bike, I want to fit a yose conversion to it but due to the frame being like a bow seems will have to buy the rear rack kit whitch is more expensive unless there is some way I could fit a down tube battery to it anyone?

 

[Waspy]

My advice to you would be forget about Yosepower and get a Woosh kit with an XF08 freewheel conversion with a bag battery.

Any Yosepower kit you choose is going to come with headaches because of your downtube and rack fittings.

 

[Sparksandbangs]

I can't see how extreme the curve is but surely 3 attachment points and some spacers would secure a down tube battery? Because of the spacers just use a larger set screw 6mm+.

Putting a flat surface on the curve like a 12" steel rule should make it clear if this is a feasible option.

 

[Peter.Bridge]

I have just purchased a giant expression it's in great condition and rides really well and no back ache as it's a sit bolt up bike, I want to fit a yose conversion to it but due to the frame being like a bow seems will have to buy the rear rack kit whitch is more expensive unless there is some way I could fit a down tube battery to it anyone?

Buy the battery from here ?

Rack Electric bicycle Battery 48V15Ah 36V15AH 20AH Li-ion E-Bike Battery fits bafang 48V 750W 36V 500W TSDZ2B tongsheng

Rack Electric bicycle Battery 48V15Ah 36V15AH 20AH Li-ion E-Bike Battery fits bafang 48V 750W 36V 500W TSDZ2B tongsheng

pswpower.com

I think I would go for the 20Ah one for the difference in price

They also (unusually) have some 250W rated 700C XF08 (freewheel) kits in stock with KT controller/display. Don't know if yours is currently freewheel or cassette, but easy and cheap to swap to freewheel if needed. (They also have front wheel XF07 kits in stock)

MXUS Electric Bike Conversion Kit Wheel Hub Motor 36V 48V 1000W 500W 250W 26 28 700C Rear Front Drive Engine eBike Kit XF07 XF08 XF08C XF15F XF15R

MXUS Electric Bike Conversion Kit Wheel Hub Motor 36V 48V 1000W 500W 250W 26 28 700C Rear Front Drive Engine eBike Kit XF07 XF08 XF08C XF15F XF15R

pswpower.com

eta - oops sorry - only 26" in the XF08 in stock, but have 700C for XF07

 

[Waspy]

Buy the battery from here ?

Rack Electric bicycle Battery 48V15Ah 36V15AH 20AH Li-ion E-Bike Battery fits bafang 48V 750W 36V 500W TSDZ2B tongsheng

Rack Electric bicycle Battery 48V15Ah 36V15AH 20AH Li-ion E-Bike Battery fits bafang 48V 750W 36V 500W TSDZ2B tongsheng

pswpower.com

I think I would go for the 20Ah one for the difference in price

They also (unusually) have some 250W rated 700C XF08 (freewheel) kits in stock with KT controller/display. Don't know if yours is currently freewheel or cassette, but easy and cheap to swap to freewheel if needed. (They also have front wheel XF07 kits in stock)

MXUS Electric Bike Conversion Kit Wheel Hub Motor 36V 48V 1000W 500W 250W 26 28 700C Rear Front Drive Engine eBike Kit XF07 XF08 XF08C XF15F XF15R

MXUS Electric Bike Conversion Kit Wheel Hub Motor 36V 48V 1000W 500W 250W 26 28 700C Rear Front Drive Engine eBike Kit XF07 XF08 XF08C XF15F XF15R

pswpower.com

eta - oops sorry - only 26" in the XF08 in stock, but have 700C for XF07

The original specs for that Giant say 7 speed at the rear which suggests freewheel.

Also, have you had a look at that frame? There seems to be no front anchor points for the rack.

I'm not sure where you would fit them on the PSWPower rack. What do you think?

 

[Waspy]

I can't see how extreme the curve is but surely 3 attachment points and some spacers would secure a down tube battery? Because of the spacers just use a larger set screw 6mm+.

Putting a flat surface on the curve like a 12" steel rule should make it clear if this is a feasible option.

Probably do-able but one would need to take great care drilling holes for rivnuts in that shape of downtube.

 

[Peter.Bridge]

The original specs for that Giant say 7 speed at the rear which suggests freewheel.

Also, have you had a look at that frame? There seems to be no front anchor points for the rack.

I'm not sure where you would fit them on the PSWPower rack. What do you think?

Well spotted - you can get seat clamps with rack mounting points

e.g. https://www.amazon.co.uk/Part-clamp-mount-28-6mm-black/dp/B01NGWI6WZ/

 

[Waspy]

Well spotted - you can get seat clamps with rack mounting points

e.g. https://www.amazon.co.uk/Part-clamp-mount-28-6mm-black/dp/B01NGWI6WZ/

I never knew such things existed.

But looking at the pictures of that bike, the seat post clamp is a long way from the rack, but I guess anything is possible if you try hard enough.

I have to say, that is not a great choice of donor bike for a conversion, and that's before we think about the brakes.

 

[Peter.Bridge]

Yes - the arms are really long and slide - I have had to cut them down before because they were catching on the bottom of the rack - I think they will be long enough.

I have to say, that is not a great choice of donor bike for a conversion, and that's before we think about the brakes.

Yes - to be fair that looks very like my first conversion and I had a lot of fun with it, until I got sick with adjusting the brakes !

 

[Waspy]

Yes - the arms are really long and slide - I have had to cut them down before because they were catching on the bottom of the rack - I think they will be long enough.

View attachment 64219

Fair enough, your knowledge of racks is greater than mine