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Recumbent What IS that thing?! Recumbents may be odd looking, but they have many advantages over a "wedgie" bicycle. Discuss the in's and out's recumbent lifestyle in the recumbent forum.

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Old 09-09-03, 11:47 PM   #1
Cyclepath
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Drilling Out an EBike Frame?

The frames on these look way overbuilt. I'm wondering to what extent they could be drilled out & still retain structural integrity (i weigh 175). How would you determine size of holes & spacing?
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Old 09-10-03, 02:19 PM   #2
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Are you referring to the bike that looks like a moped with an electric motor?
I doubt that a significant change in weight would come from drilling out the frame. Why not switch to lithium cells to save weight? Steve
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Old 09-10-03, 06:04 PM   #3
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Hi Steve. This is the recumbent (human-powered) with the simple box beam frame. It's fairly massive. Of course this may be a crazy or silly idea - i certainly wouldn't consider it with a conventional bike frame, but i'm a tinkerer by nature.:->
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Old 09-13-03, 01:07 AM   #4
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I think he has misplaced his E.
BikeE (bankrupt recumbent) vs. ebike (Lee Iacocca's 24V & 36V electrics-uprights and folders).
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Old 09-13-03, 04:12 PM   #5
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ebike already went to Lithium ion batteries on their folder, but they still use lead acid on their other models. NiMH is lighter.
I believe Ford's Th!nk Bike had lithium batteries as well before they pulled the plug on that program.
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Old 10-08-03, 03:00 PM   #6
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You might not save as much weight as you think. Aluminum weighs .11 lbs per cubic inch. Lets say you cut 20 holes, 1.5" dia. in a 1/8" wall square tube. All that work and you only save .48 lbs.
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Old 11-02-03, 09:47 PM   #7
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You won't save enough weight to notice it. A better option is to not supersize those fries. ;^)
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Old 02-10-04, 12:39 AM   #8
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I think these hilarious pics should remove that notion that the BikeE frame is overbuilt.
Note the frame bent rather than the chain snapping.

http://joesacher.com/cycling/motorbikee.php
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Old 02-10-04, 09:14 AM   #9
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However, if you do put the holes in your frame you can brag about how you transformed the bike frame material from aluminium to Drilleium .
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Old 02-10-04, 12:01 PM   #10
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Now that's getting sillium!
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