Home Made Bikes

Author Message
flag Arnoodles
Posted: May 20, 2016 at 13:58 Quote
Tom-Donaldson wrote:
Anybody got any standards documentation around stuff like brake mounts, headset, BB, rear derailleur etc, everything bike frame related really. Any input would be really helpful, if found the odd google image of an old drawing but not sure I can trust them haha Big Grin .

Cheers
For headset stuff cane creek has a few documents with anything you'd ever want to know. All the sizes, types, tolerances, etc. Linky.
flag brigand
Posted: May 20, 2016 at 14:00 Quote
Any of you guys heard of durafix rods?

The temperature is 398°C, would it be good for frame repair?
flag sterlingmagnum
Posted: May 21, 2016 at 7:11 Quote
that looks interesting.... would have loved that when i was making angle alluminum mounts for Webasto heaters on yatchs 20 years ago.....
flag abrooks
Posted: May 23, 2016 at 5:21 Quote
Tom-Donaldson wrote:
Anybody got any standards documentation around stuff like brake mounts, headset, BB, rear derailleur etc, everything bike frame related really. Any input would be really helpful, if found the odd google image of an old drawing but not sure I can trust them haha Big Grin .

Cheers

Have you looked at Grabcad?
flag l-plates
Posted: May 23, 2016 at 5:21 Quote
Re Durafix - I suspect it is a zinc alloy like the lumiweld and other aluminium repair systems. There are other things out there like this:https://www.aluminumrepair.com/hts-2000-second-generation-fluxless-brazing-rod/
Was going to use it to repair some kurb rash on some alloy wheels but apparently it comes out a slightly different colour so never bothered to investigate further.
Apparently it's brilliant for repairing car radiators and intercoolers etc.

I stuck my head in to the bicycle academy on Friday and got a chance to speak to BTR about a custom build with an Alfine hub, way over £1000 was the response.

Finished the home build up just in time for a day at bike park wales on Thursday, she did well and has come back with no creaks or rattles.

Post BPW photo courtesy of TBA https://www.facebook.com/TheBicycleAcademy/photos/a.219359478081829.63370.218788201472290/1271104419573991/?type=3&theater

Unsecure image, only https images allowed: http://i159.photobucket.com/albums/t157/ka_screech/Prototype%20434/13112885_1271104419573991_3996186097919103958_o_zpsuaxxkd33.jpg
Will post the Geo up later as I can't remember everything off the top of my head.

Head angle - 63.2
BB - 14"
Chain stays - 420mm (grows with compression)
Wheel base - 1160mm
Travel - 185mm (2.9:1 rising to 2.4:1)
flag HardtailsAreGnarly
Posted: May 23, 2016 at 10:07 Quote
l-plates wrote:
Re Durafix - I suspect it is a zinc alloy like the lumiweld and other aluminium repair systems. There are other things out there like this:https://www.aluminumrepair.com/hts-2000-second-generation-fluxless-brazing-rod/
Was going to use it to repair some kurb rash on some alloy wheels but apparently it comes out a slightly different colour so never bothered to investigate further.
Apparently it's brilliant for repairing car radiators and intercoolers etc.

I stuck my head in to the bicycle academy on Friday and got a chance to speak to BTR about a custom build with an Alfine hub, way over £1000 was the response.

Finished the home build up just in time for a day at bike park wales on Thursday, she did well and has come back with no creaks or rattles.

Post BPW photo courtesy of TBA https://www.facebook.com/TheBicycleAcademy/photos/a.219359478081829.63370.218788201472290/1271104419573991/?type=3&theater

Unsecure image, only https images allowed: http://i159.photobucket.com/albums/t157/ka_screech/Prototype%20434/13112885_1271104419573991_3996186097919103958_o_zpsuaxxkd33.jpg
Will post the Geo up later as I can't remember everything off the top of my head.

Head angle - 63.2
BB - 14"
Chain stays - 420mm (grows with compression)
Wheel base - 1160mm
Travel - 185mm (2.9:1 rising to 2.4:1)

Looks awesome I-Plates! Looks quite different to more normal stuff. You planning to paint it or just leave it as it is? Seen as it looks so sweet design wise would be a shame not to finish it off with a nice fresh powder coat Wink
flag l-plates
Posted: May 24, 2016 at 0:57 Quote
Just been painted in a graphite grey with the links and dropouts polished up. tup
I just ran out of time before our bike park wales trip, I was tweaking the linkage 8pm the night before!

Picked the Geo up this morning:
Seat tube Centre to top - 450mm (17.75") @ 73.7 degrees
Stand over - 760mm (30")

Top tube - 535mm (21.75")
Effective TT - 585mm (23")

The 420mm chain stays may sound short but the pivot is high and makes the bike longer at sag, the effective chain stay length at sag is something like 430mm and about 450mm at bottom out, because it grows as you push into it is stays lively around sag and stable when your in the travel. It is the same trick that commercial have pulled with the new V4 and why bikes like the Cranfield Jedi and Balfa feel so stable in the rough.
flag monkeyboyjc
Posted: May 30, 2016 at 11:52 Quote
Home made bamboo gravel cyclo cross bike

Just finished building up a bamboo gravel / cyclocross frame.
flag Thepureface
Posted: May 30, 2016 at 19:09 Quote
f*cking right bud!

That's cool!
flag laynehip
Posted: Jun 6, 2016 at 8:51 Quote
Have always wanted to build a bike and finally decided to start doing it.
Started designing this one around a Super Monster T I have sitting around but decided it might be too complicated for my first build.
photo

So moved on to designing one around an old Stratos S8 I have for my first attempt. Want to build the front triangle from square tubing.
photo

No real progress yet though. Hopefully soon.
flag bmxsnox
O+
Posted: Jun 6, 2016 at 11:49 Quote
Finished up my first full suspension build this weekend. Rides quite well, the steep seat tube angle really helps climbing with the slack head tube angle.

First full suspension frame build. 64deg head tube 75deg seat tube 13.4 bb 24 top tube. 140mm rear travel with 150-160mm front 160 shown .

64 deg head tube, 75deg seat tube, 24" top tube, 13.4" bb height.
flag brigand
Posted: Jun 6, 2016 at 12:25 Quote
Great numbers, good looking bike, pivot is in the right place, leverage ratio looks progressive - mine would look a lot like this if i was to build another one.
flag dump
Posted: Jun 6, 2016 at 12:26 Quote
@bmxsnox impressive! What did you use for jigging and alignment?
flag bmxsnox
O+
Posted: Jun 6, 2016 at 12:56 Quote
dump wrote:
@bmxsnox impressive! What did you use for jigging and alignment?

I found some used 80/20 on ebay and made myself a jig.
photo

After the main frame was complete, then I made smaller fixtures for things like the IS brake mount. It took some research, but the information on this thread along with the mtbr frame building forum got me though it.
photo
flag XCMark
Posted: Jun 6, 2016 at 13:20 Quote
bmxsnox wrote:
Finished up my first full suspension build this weekend. Rides quite well, the steep seat tube angle really helps climbing with the slack head tube angle.

First full suspension frame build. 64deg head tube 75deg seat tube 13.4 bb 24 top tube. 140mm rear travel with 150-160mm front 160 shown .

64 deg head tube, 75deg seat tube, 24" top tube, 13.4" bb height.
BRB, need to go change underwear!

 


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