so about a year ago, my custom steel frame broke around the chainstay over here
this was a columbus steel frame with supported several mid-drives around 1500-2000 watts, it rode for 2 years around 10000 km
while there might several reasons to this (one being there were times i didn't tighten enough the sliding drop outs, the wheel would skew and rub against the chainstay without me noticing it) i think i cam up with another cause. which i'm thinking over when trying to design a new frame from my builder.
this is the bare frame
and this is how it looked when fully loaded
the seat angle was 71 degrees, and most of the time it sported a cane creek
which also broke.
when i ordered the frame i wanted to sitting position to be upright with a large triangle to house a battery.
the problem was the angle seat tube didn't go well with the b190 saddle, which pressed on .. ah... sensitive area, when i tried to reach the handle bars.
so most of the time i would be try to move back as possible on saddle to avoid that area...
now if you consider i was 250 lbs (230 now) , when i look the photo of the frame fully loaded i think this created a huge load on the frame , especially when i would hit a speed bump on the road, brake, or drop from a large pavement (i won't lie it was rather fun feeling the springiness of the seat along with the crane creek absorbing the shock) .
but since frame had no jig around brake side like some frames do, and because of the combination of my sitting arrangment and angle, those could have contributed to the frame failure right?
because i wanted a 29er with 68mm threaded bb shell, i've ordered this frame (venzo frame, heard it had some good reviews, but you can pick it at wal-mart which doesn't sound good) , which has 73 degrees seat angle as test before i try another custom fame, you'll notice it's chainstay are shaped more robust and do have support on brake side. while it's only 20" (i'm 6'3), i have a 20" paratrooper pro which feels rather nice.
what do you think? could i be right?
this was a columbus steel frame with supported several mid-drives around 1500-2000 watts, it rode for 2 years around 10000 km
while there might several reasons to this (one being there were times i didn't tighten enough the sliding drop outs, the wheel would skew and rub against the chainstay without me noticing it) i think i cam up with another cause. which i'm thinking over when trying to design a new frame from my builder.
this is the bare frame
and this is how it looked when fully loaded
the seat angle was 71 degrees, and most of the time it sported a cane creek
which also broke.
when i ordered the frame i wanted to sitting position to be upright with a large triangle to house a battery.
the problem was the angle seat tube didn't go well with the b190 saddle, which pressed on .. ah... sensitive area, when i tried to reach the handle bars.
so most of the time i would be try to move back as possible on saddle to avoid that area...
now if you consider i was 250 lbs (230 now) , when i look the photo of the frame fully loaded i think this created a huge load on the frame , especially when i would hit a speed bump on the road, brake, or drop from a large pavement (i won't lie it was rather fun feeling the springiness of the seat along with the crane creek absorbing the shock) .
but since frame had no jig around brake side like some frames do, and because of the combination of my sitting arrangment and angle, those could have contributed to the frame failure right?
because i wanted a 29er with 68mm threaded bb shell, i've ordered this frame (venzo frame, heard it had some good reviews, but you can pick it at wal-mart which doesn't sound good) , which has 73 degrees seat angle as test before i try another custom fame, you'll notice it's chainstay are shaped more robust and do have support on brake side. while it's only 20" (i'm 6'3), i have a 20" paratrooper pro which feels rather nice.
what do you think? could i be right?