 the one that I want to do since there aren't a lot of quality choices in that category. Maybe later on down the road we could offer both.
Those do look nice. I wonder what the toe overlap is gonna be like. Do both frames still have the 73/74 degree head angle?
...I wonder what the toe overlap is gonna be like...
toe overlap will be a non-issue. we thought these out against my current cruiser(which has none) and still went with longer toptubes to add some insurance. now that we need to run mtb forks on them that will give even more clearance since the leading edge of the wheel will be even lower than anticipated adding about another 15mm or so to the distance from the bb...
mine(yellow) has a 73.5 head angle and the black(bryceXlighthall's) has the 74...
Why should the headset be any different? I have never known a ton about the "intricacies" of bike-techie ****, but I was just gonna swap my headset from my eastern.
bryce meet joke, joke meet bryce...
Well, there seems to be a ton of folks on this forum that appear to spend a lot of time thinking about that sort of thing. I am out-to-lunch on most things on this board besides actually being able to ride. Ps. You missed a good bike launch on Friday.
There's a thread over on mtbr about the proper headset for dh use.
I'm actually going to kind of miss these things. I thought about keeping one for myself. Here are the specs and some more pics.
Both are based around a 460 mm axle to crown fork.
Right at 6 lbs. They are a little heavier than I wanted. Part of it is due to them being based around a suspension fork instead of a cruiser fork, because that makes the downtube longer. I'm going to do a few things to lighten up the cruiser version. Probably slightly smaller diameter tubing for the stays and possibly an internally butted seat tube.
Mine will be less than that, I'm shaving the seat post flat and edging out the dropouts, compliments of Andrew Jackson's Dad's grinder.
-Huge positive on the weight (tubing diameter)... I will never bend the rear triangle.
good first stab cru! there's something to be said about actually gettin sh1t done no matter if it's 100% correct or not. proto's get sent out w/ mistakes more than you would think.
drop outs look clean. look kinda like fit hawk drops...taiwan vendor cru?
are the chainstay tubes crimped for tire clearance?
chainstays look beefy as fvck haha. they look like my old bmw park bike. you could prob shave a lot of weight from those.
angled guide is a nice touch.
Thanks. Yeah, I have mixed feelings about these frames. There is a little sense of accomplishment, but disappointment at the same time in that they aren't exactly right.
Yeah, seat tube is notched for a clamp, just can't see it in the pictures.
I like the drops, too. Yeah, Taiwanese vendor. I don't think it's the same as Fits, but who knows... there aren't that many of them. I'm still not sure if I should say who I'm working with... I should ask if it's kosher to share.
Yeah, stays are crimped for clearance on a 2.3 tire. They are also crimped on the drive side for clearance of a 32 tooth chainwheel. I thought about doing some sort of yoke setup to minimize the harsh crimps. But, I also wanted to keep it as modern bmxish as possible. The bends actually aren't as bad as I had feared. And it seems strong as hell with that size of tubing and bridges on both stays.
Glad you noticed the angled guide. I think for the cruisers, we will go with removable mounts and guides.
Nice. What do you mean by edging the drops? Don't touch those things!! Haha.
What kind of wedge post are you going to get? I recommend the Stolen over the Animal. It will apply the pressure more evenly in the seat tube, plus you can get a shorter one.
Nice job Cru. Maybe I missed this but is that an American bbrkt? It looks huge.
Mid, to accommodate folks running bigger spindles.
little progress report. bxl's bike is far more complete than mine, but i need a front wheel still before i convert the rest of my parts over from my cruiser(who's got a 24" front wheel on a 20mm hub?). modded down a 4x to 40-45mm's and threw on some black dj lowers. flat blacked the knobs and the nemesis stem. the yellow is so bright, it's practically impossible to get a picture without the glare...
with the fork at that a2c, what headangle are you gonna end up with?
about 74.25ish which is the ballpark i like. i already measured the front center with the fork backward against my current bike and they stack up identically and i have no foot clearance issues with my cruiser right now...
With the fork at 40-45mm is it just about a rigid fork?
ah man these angles seem so steep to me... I've been taught on my dads principles that even 72 is "way steep"...different era, yes. But I feel slacker angles keep you out of trouble.
Depends what fork... thats gonna leave you at around 425-420 a2c.
nah, feels good and ramps up pretty quick too. just enough travel, but not much. i wanted to put a rigid on it, put that would have required a purchase...
edit: fork has a shorter a2c than most rigid forks. the black market contraband would have been the perfect rigid fork for this frame...
these aren't meant to be your dad's mountain bikes. hell, it's not even really meant to be a "mountain bike" at all. it's supposed to be a bike with todays aggressive bmx geometry that rolls on 24" wheels...
I understand that, and I also said that is what HE told me. His opinions... I plan to build my next frame with a steeper H/A than he would like to see, but I told him its my frame and ima build it how I want. Just saying that I STILL think 74 sounds super steep.
the top tube on these things is pretty long, eh? with such a steep HA, seems like it'd have to be, for toe clearance issues..
makes me wonder if the STP I'm looking at might be too slack? I like a twitchy bike...
...I STILL think 74 sounds super steep.
seeing as how this is designed to be more 20" bmx geometry oriented, it couldn't be any more spot on. technically it was actually designed around a 463mm a2c to have some 73.5 action. i'm under that, but like a steeper more responsive HA opposed to the slacker sluggish feel of the 69-70 degree realm. it's custom stuff, you more than most, should know where we're coming from...
I understand COMPLETELY where you're coming from, all I'm saying is from what I've ridden (which is deffinitally nothing like you..) I have not enjoyed the steep BMXish H/A's. You shred and shred hard, you know what you like, and I respect that.
Steep is more fun, and slack is more forgiving.
The frames look sweet!
that semi build is looking good.
you sure those crowns and knobs clear the dt?
WOAH!........ Nice shovel! Is that bad boy from home depot or local tool shop?
Reminds me of my favorite shovel someone jacked from my garage. It had to be 30 years old. I snapped it straight through the steel neck, then rewelded it with a plate steel gusset.
One thing to keep in mind when comparing head angles between a bmx and mtb is that a mtb fork has more offset than a bmx fork, which reduces trail.
So if you have a bmx and mtb with equal head angles and equal wheel sizes the mtb will have less trail by nature of the fork offset, and be less stable.
Wheel size, head angle and offset effect trail. You will notice that the offset increases on forks designed for bigger wheels, that was the whole thing for the new gary fisher g2 geometry on 29" xc bikes, they increased the fork offset so that they could slack out the head angle and achieve the same trail numbers but increase the toe overlap.
Not saying you can't shred on 74 degree ha, but it will be even more sketchey than a bmx cruiser.
your post makes my head hurt. i'm not a numbers geek, i just ride and know what i like. my current wheelbase is the same as the new one, that's also why i stated that the front center on both bikes(my current cruiser where i have no issues and new the mtbmx) are the same with the fork reversed(where the overlap would occur) and they measure out to the same so there should be no issues on my bike...
and FWIW, my last 2 hardtail mtb frames also ran a 74 degree HA, that's just how i roll. i can't stand a bike with anything less than 72 anyway, feels like i'm riding a cho