[troy]

<boredom>

#25mm OFFSET ALERT

I decided to make use of my ex dh01 bike.

Deleto:
-chainstayzz
-seatstayzz
-rockerzz
-big shockzz
-seattube gussetzz

Plan:
Use the old front triangle
Cut the old gusset, make a fancy new one.
Use much shorter fork - modified 6" (or even lower) White brothers DH2 USD fork with 25mm offset (g2 make new internals, increase bushing overlap, shorten upper tubes) 31.75mm stanchions , just likeBCD fork (got one laying around, collecting dust)

Convert my old Hope Pro 2 12x150mm axle to a 20mm through axle and make some nice chainstays out of CF probably.

27.5" wheelz
66deg. HA
75 STa
46.25" WB
13.15"bbh
7/8" bb drop
450mm reach
575mm stack
Single pivot
17.12" CS
0.66" rearward axle path
5.1" of travel
200x57 air shock (got a spare monarch) - most likely will modify it to make negative chamber bigger somehow.

</boredom>

DISCUSS NAO!

 

[StiHacka]

66HA not slack enough for such a short offset, IMHO. Make it 65 or 64.5 and it will ripzz.
13.15 bhh - too high
17.12" CS - spot on

 

[troy]

66HA not slack enough for such a short offset, IMHO. Make it 65 or 64.5 and it will ripzz.
13.15 bhh - too high
17.12" CS - spot on

If I will slacken it, i will loose some reach.

 

[kidwoo]

If I will slacken it, i will loose some reach.

Yeah might be like 4 mm or something making it completely unridebru despite some useless pointless gain in headangle stability and increase in wheelbase.

 

[StiHacka]

If I will slacken it, i will loose some reach.

That's a big (1.5") headtube, right? Can you extend the reach with offset headset?

 

[kidwoo]

hay guys!

If you need more reach™ just put a longer stem on!

 

[StiHacka]

hay guys!

If you need more reach™ just put a longer stem on!

Oh leave me out of this, I ride a trail bike with an unrideabru short reach and a DH bike with a negative one!

 

[kidwoo]

Hey Troy: what white brothers fork is that?

I'd think your 25mm offset is going to climb like shit on anything but 26" wheels......and even then probably not great.


Rest of the numbers look fun. You no dh anymore?

 

[SuboptimusPrime]

Only number that got my attention was STA. For a pedaling bike I'd rather be a degree or two steeper. But understand your reach concern and its not like 75* is the end of the world.

Looks sick!

 

[buckoW]

How are you thinking about doing the carbon? Vacuum bagging over foam cores or something?

 

[Nick]

Will it have a sweet owl headtube badge?

 

[Bikael Molton]

Looks cool!

I say slacker HA, and longer stem, offset cups, flat bar can help you get more reeeech.

 

[marshalolson]

Closely paying attention!
Been thinking about a similar project for a frame sitting around the garage

 

[konastab01]

BCD, Always wanted one of alex's bikes.

 

[troy]

How are you thinking about doing the carbon? Vacuum bagging over foam cores or something?

Yeah, that's exactly what I'm gonna do.

Will it have a sweet owl headtube badge?

OFC!

Finally decided on geo numbers, and bought a 29" RS Domain that I'm gonna lower to 130mm.

Did my 1st cut today!

 

[norbar]

<boredom>

#25mm OFFSET ALERT

I decided to make use of my ex dh01 bike.
View attachment 144533
Deleto:
-chainstayzz
-seatstayzz
-rockerzz
-big shockzz
-seattube gussetzz

Plan:
Use the old front triangle
Cut the old gusset, make a fancy new one.
Use much shorter fork - modified 6" (or even lower) White brothers DH2 USD fork with 25mm offset (g2 make new internals, increase bushing overlap, shorten upper tubes) 31.75mm stanchions , just likeBCD fork (got one laying around, collecting dust)
View attachment 144534


Convert my old Hope Pro 2 12x150mm axle to a 20mm through axle and make some nice chainstays out of CF probably.

27.5" wheelz
66deg. HA
75 STa
46.25" WB
13.15"bbh
7/8" bb drop
450mm reach
575mm stack
Single pivot
17.12" CS
0.66" rearward axle path
5.1" of travel
200x57 air shock (got a spare monarch) - most likely will modify it to make negative chamber bigger somehow.


</boredom>

DISCUSS NAO!

You sure about that bb height on a trail bike? Since trail riding involves more going over obstacles than DH. Especially given you go with a fairly conservative HA so it's not a small enduro bike.

Also why not a mullet? I know it sounds like a trend but the rolling benefits are waaaay bigger than I thought in mullet vs 27.5''.

As for shocks - look around olx. Not sure if they still pop up but some shops used to sell destroyed ohlins ttx's for sub 1000 pln. Those are rebuildable from almost any condition.

 

[Happymtb.fr]

Did my 1st cut today!

It is quite something to cut a frame maybe even more when you gave designed it!
Me 2 years ago
#bachowashere

 

[troy]

You sure about that bb height on a trail bike? Since trail riding involves more going over obstacles than DH. Especially given you go with a fairly conservative HA so it's not a small enduro bike.

Also why not a mullet? I know it sounds like a trend but the rolling benefits are waaaay bigger than I thought in mullet vs 27.5''.

As for shocks - look around olx. Not sure if they still pop up but some shops used to sell destroyed ohlins ttx's for sub 1000 pln. Those are rebuildable from almost any condition.

Well, the geo changed, check out the latest post. I bought a 29" domain, to turn it into a mullet, it might not be apparent just by looking at the model/drawings tho.

Coil shock for such design is imho a big nono.

It quite something to cut a frame maybe even more when you gave designed it!
Me 2 years ago
#bachowashere
View attachment 189556

Got moar pics? Looks dope AF!

 

[Westy]

You are going to void your warranty.

 

[sethimus]

You are going to void your warranty.

not ridden much, no bikepark days

 

[kidwoo]

great time to bring up those kendas in your 2020 post.....


And by bring up I mean "throw at a hiker"

 

[norbar]

Well, the geo changed, check out the latest post. I bought a 29" domain, to turn it into a mullet, it might not be apparent just by looking at the model/drawings tho.

Coil shock for such design is imho a big nono.


Got moar pics? Looks dope AF!

I don't remember the susp curve. You could always shop around for those old Fox RC4's with the thick shaft since they were inherently progressive. (Plus they took shorter 5th element ti springs quite well if you want to go low weight)

 

[troy]

I don't remember the susp curve. You could always shop around for those old Fox RC4's with the thick shaft since they were inherently progressive. (Plus they took shorter 5th element ti springs quite well if you want to go low weight)

I would end up with some clown ass 600-700lbs spring rate with such a short shock. I don't want to deal with this nonsense. Also, I prefer more "poppy" feel of an air shock with this kind of a bike.

 

[norbar]

I would end up with some clown ass 600-700lbs spring rate with such a short shock. I don't want to deal with this nonsense. Also, I prefer more "poppy" feel of an air shock with this kind of a bike.

Ah yes forgot about this. Then again it would be more retro and you could pretend you own a KHS Dh-100 and your shock will overheat mid run