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flag bcpblurker
O+
Posted: Apr 23, 2016 at 14:23 Quote
Hey guys,

I hope I am not breaking any rules, but I thought that this group of people would be the best to ask since we all aspire to build a bike for one reason or another...you are the focus group!

I have a marketing assignment due Monday, and your input on mountain bikes would be awesome! This is a purely academic exercise/
https://www.surveymonkey.com/r/2DSY85B

It is only 10 questions, and I hope you get a laugh out of a couple of them.

Many thanks!
flag DanDrago
Posted: Apr 23, 2016 at 20:59 Quote
letoy2 wrote:
Hey guys,

I hope I am not breaking any rules, but I thought that this group of people would be the best to ask since we all aspire to build a bike for one reason or another...you are the focus group!

I have a marketing assignment due Monday, and your input on mountain bikes would be awesome! This is a purely academic exercise/
https://www.surveymonkey.com/r/2DSY85B

It is only 10 questions, and I hope you get a laugh out of a couple of them.
Many thanks!
You should put up your results!
flag HardtailsAreGnarly
Posted: Apr 24, 2016 at 8:22 Quote
DanDrago wrote:
letoy2 wrote:
Hey guys,

I hope I am not breaking any rules, but I thought that this group of people would be the best to ask since we all aspire to build a bike for one reason or another...you are the focus group!

I have a marketing assignment due Monday, and your input on mountain bikes would be awesome! This is a purely academic exercise/
https://www.surveymonkey.com/r/2DSY85B

It is only 10 questions, and I hope you get a laugh out of a couple of them.
Many thanks!
You should put up your results!

Yeah I want to see the results too
flag bcpblurker
O+
Posted: Apr 24, 2016 at 8:43 Quote
Will do tonight! They are actually rather surprising so far! I know my questions are rather biased, but surveys are boring otherwise lol.
flag sterlingmagnum
Posted: Apr 24, 2016 at 9:44 Quote
letoy2 wrote:
Will do tonight! They are actually rather surprising so far! I know my questions are rather biased, but surveys are boring otherwise lol.


If I win....Can I get cartoon speedlines?

Wink
flag bcpblurker
O+
Posted: Apr 24, 2016 at 11:41 Quote
https://www.surveymonkey.com/results/SM-C7DZ9G3S
/ LOL

there is no winning in this haha!

Honestly i wish I had the time to come up with better questions. Ones that were funny, but did not guide people to a certain answer or offend anyone.

Surprisingly, if I were to follow this market research I would not be building the bike I want!

Which is why on this thread we all build our own bikes!

So:

Current Companies are building bikes that are focused on climbing ability. In my opinion.
The survey says customers want bikes that are more reliable, cheaper to maintain and cost less initially, and focus on the descents.

. Personally, I want to build a 65* HTA 100-120mm 29er that weighs no more than 30lbs.


Thanks everyone for participating in the survey!
flag HardtailsAreGnarly
Posted: Apr 24, 2016 at 14:00 Quote
letoy2 wrote:
https://www.surveymonkey.com/results/SM-C7DZ9G3S
/ LOL

there is no winning in this haha!

Honestly i wish I had the time to come up with better questions. Ones that were funny, but did not guide people to a certain answer or offend anyone.

Surprisingly, if I were to follow this market research I would not be building the bike I want!

Which is why on this thread we all build our own bikes!

So:

Current Companies are building bikes that are focused on climbing ability. In my opinion.
The survey says customers want bikes that are more reliable, cheaper to maintain and cost less initially, and focus on the descents.

. Personally, I want to build a 65* HTA 100-120mm 29er that weighs no more than 30lbs.


Thanks everyone for participating in the survey!

SO basically, we all want cheap, bomb proof enduro bikes Big Grin Cool
flag sterlingmagnum
Posted: Apr 24, 2016 at 15:22 Quote
Is that too much to ask for? Wink

If you really think about some of the stuff you have sallied your bikes through... They really are amazingly durable... I recently rode some DH on my hardtail and was thinking midway... Jesus christ i cant believe what this thing is capable of... I thought at any moment it wouldnt have surprised me if it turned to dust... Alas... Emerged Unscathed.
flag l-plates
Posted: Apr 25, 2016 at 0:40 Quote
Looks to me like the general feeling is that modern bikes are pretty good with a lot of people being satisfied with the performance, Geometry seems to be a bit hit and miss and the prices are out of control.

Having done a bit of inflation calculating frames have remained roughly the same, my £1600 (expensive) balfa would be ~£2100 now, (still expensive).
Something cheaper like a clubroost DH8 would be about the same as a commencal supreme now.
What has happened is the bikes are more reliable with a better frame for the money.

Parts seems to be the big one, why have some components go so damn expensive, forks in the main.


Anyway, back to frames, Spent most of the weekend machining pivots and boring bearing seats. Manage to get the main pivot and axle machined, cut the bearing seats for the links, didn't take any photos really so will get some tonight maybe.

Photos from Friday below, link plates, bearings and dropouts laid out.
Unsecure image, only https images allowed: http://i159.photobucket.com/albums/t157/ka_screech/Prototype%20434/20160415_203512_zps6owlhrm1.jpgUnsecure image, only https images allowed: http://i159.photobucket.com/albums/t157/ka_screech/Prototype%20434/20160421_184911_zpss9glglxl.jpg
And a somewhat acceptable TIG bead, getting my eye back in now so there is hope this one won't fall apart. lol

Edit - Oh and obviously some more finishing work on the out profile of the links to go yet. I just roughed them out enough to be able to use them to put the frame together.
Pretty can come later.
flag l-plates
Posted: Apr 26, 2016 at 5:03 Quote
This weekends progress saw the pivot stubs machined, the bearing housings for the swing arm and the bearing seats for the links done.

Still some finishing to do on the links and a bit of finishing off to do on the drop out bolt on bits to make them into double shear mounts but enough done to start cutting the tubing to make the rear end over the coming bank holiday weekend.

Unsecure image, only https images allowed: http://i159.photobucket.com/albums/t157/ka_screech/Prototype%20434/20160425_194646_zpsh11snuee.jpg
Unsecure image, only https images allowed: http://i159.photobucket.com/albums/t157/ka_screech/Prototype%20434/20160425_194738_zpst2hbxmzf.jpg
Unsecure image, only https images allowed: http://i159.photobucket.com/albums/t157/ka_screech/Prototype%20434/20160425_195044_zpsqnbunvhe.jpg
flag l-plates
Posted: Apr 28, 2016 at 4:51 Quote
Welding/material question for the more experienced on here.

I span up the pivots etc over last weekend using some steel left over from another job, I am now told it is not suitable for welding due to the sulphur content being 0.2-0.3%

I have used it for the pivot stubs and the bearing housings for the swing arm, both pretty critical areas should the welds crack.

The steel I used was non-leaded EN1a (a free cutting mild also known as 230M07) and was machined down to a 2mm thickness where it meets the tubes.

I don't really want to spend another weekend re-machining these bits in EN3 as I want to spend this long weekend completing the frame. Ordering more steel would stop play completely and probably mean I can't get the frame sorted for the 15th when I was planing to test it out.

Question is, has anyone got experience with welding EN1a? Are the internet stories of solidification cracking massively over blown?

If not the other option is to weld a band around the stubs to double the weld area and create a fail safe condition where a cracked weld would only result in a loose stub and a controlled stop rather than a sudden failure.
flag alted
Posted: Apr 28, 2016 at 13:16 Quote
l-plates wrote:
Welding/material question for the more experienced on here.

I span up the pivots etc over last weekend using some steel left over from another job, I am now told it is not suitable for welding due to the sulphur content being 0.2-0.3%

I have used it for the pivot stubs and the bearing housings for the swing arm, both pretty critical areas should the welds crack.

The steel I used was non-leaded EN1a (a free cutting mild also known as 230M07) and was machined down to a 2mm thickness where it meets the tubes.

I don't really want to spend another weekend re-machining these bits in EN3 as I want to spend this long weekend completing the frame. Ordering more steel would stop play completely and probably mean I can't get the frame sorted for the 15th when I was planing to test it out.

Question is, has anyone got experience with welding EN1a? Are the internet stories of solidification cracking massively over blown?

If not the other option is to weld a band around the stubs to double the weld area and create a fail safe condition where a cracked weld would only result in a loose stub and a controlled stop rather than a sudden failure.

Do you have any more of the EN1a that you could do a trial with. I would say as soon as you have finished welded it you will know if its any good. A lot of hydraulic fittings are made with free cutting materials to speed up machining times and formability and are a mongrel to weld. Burn up some trial bits and give them a whack with a hammer.
flag theMISSIONARY
Posted: Apr 28, 2016 at 16:17 Quote
its not going to be a nice or good thing to weld IMHO...as above you could try welding it if you have some left over but i doubt it will be any good long term......no one likes cracking Wink
flag madm3chanic
Posted: Apr 29, 2016 at 6:23 Quote
so this week i started my two most ambitious projects iv ever been involved in- i made most of the jigs i need to build the Handbikes for a company called Advantage here in WA, and started building my monster electric deathbike, at long last! to be honest im not sure if either is really suitable for this forum (one is an electric dirt bike, the other a hand bike for paraplegic riders, not really bicycles per se)

hows this for a set of dropouts- made them this morning

Descendence deathmachine prototype dropouts
Descendence deathmachine prototype dropouts
Descendence deathmachine prototype dropouts

they are 12mm bolt-thru's, the little chip in the middle comes out and splines into the teeth to hold the wheel in place without chain tugs. they have no disc mount tabs because this thing is gonna have a full floating brake setup mounted on a separate plate pivoting around the axle.

and just thought id share one of the jigs i made for the handbikes- (i say "jigs" because i have five separate jigs to make these things, they are super complex compared to bicycles)

Handbike jig 1

its a funny looking thing, but all the same principals apply to it as to a bike jig. this is definitely the fanciest jig iv made so far Smile deosnt really apply to bicycle building, but its kinda related so im rolling with it Smile

https://www.facebook.com/The-first-Off-road-Handcycle-to-be-made-in-Australia-135751383448566/?fref=nf

this is Dan's facebook page for the handbikes, in case anyone is interested. he's got some nasty post-crash pics (he was a state level mountainbiker before his accident) and a little back story about how he became a paraplegic and his quest now to build handbikes for riders like him in australia. its actually a really cool thing to be involved with Smile
flag sterlingmagnum
Posted: Apr 29, 2016 at 6:37 Quote
that's really cool Mad...

 


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