titanium frame for an ebike?

emaayan

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this is 2nd frame i found which is also a 29er AND 68 mm bb shell, how ever it is titanium, and while i know carbon is bad, steel is best , not sure about ti,
http://www.bikeman.com/CARV-TI99.html

i recall i read ti flexes a and may fracture..
 
Titanium is resilient and tough. But just like steel, if it's made too light, it's prone to cracking, denting and other failures. A commercial frame made from 3Al-2.5V alloy should be as reliable as a similarly configured chromoly steel frame weighing 40-50% more. With identical dimensions, it's only about 60% as stiff as steel, which is why Ti frames are usually made from slightly fatter tubing than steel frames.
 
I can answer with a personnal experience about a Ti frame

A friend who was riding mountain trails with me, had bought a Titanium MTB frame and transfered all the components from his old bike on it. He was doing his first ride. After the mountain ride, we were coming back riding the streets when a car did hit both of us. I was lucky and jumped on the sidewalk, ending up with minor injuries an a crooked wheel. My friend was on the street with bad pain on knee and leg, and his new bike was bent like a banana. 20 minutes later the car driver was filling the papers with him, to claim his 1500$ frame to the insurance company. We heard a sudden crash noise behind us and jumped aside, thinking that another car was going to hit us. It was his frame, that had suddenly sprung to its original shape. He is still riding it today, 9 years later.
 
https://www.glowwormbicycles.com.au/collections/ezee-electric-bicycles/products/ezee-torq-t1
 
MadRhino said:
I can answer with a personnal experience about a Ti frame

A friend who was riding mountain trails with me, had bought a Titanium MTB frame and transfered all the components from his old bike on it. He was doing his first ride. After the mountain ride, we were coming back riding the streets when a car did hit both of us. I was lucky and jumped on the sidewalk, ending up with minor injuries an a crooked wheel. My friend was on the street with bad pain on knee and leg, and his new bike was bent like a banana. 20 minutes later the car driver was filling the papers with him, to claim his 1500$ frame to the insurance company. We heard a sudden crash noise behind us and jumped aside, thinking that another car was going to hit us. It was his frame, that had suddenly sprung to its original shape. He is still riding it today, 9 years later.

for real? sounds like it's the t1000, or like steven king's christine :shock:

[youtube]4jG5wWl--zw[/youtube]
 
If I was to build up another hard tail bike, and had the money , Titanium is the Frame I would get.

I have ridden many of the Good Cro-Moly , Double and even triple butted frames that were popular back over 10- 15 years ago when they were selling well because
they were " The Poor Man's Titanium "
And then I rode a good Titanium Hard Tail frame, it was the best hard tail I have ever ridden. I did not buy it. but should have.

For the $1,200 price that that one is, I would Not buy it, I would find a brand name Ti frame on sale . ( last years model , and soon this years model )

If you can get your hands on a Moots YBB, you will have a life time frame, or at least a very long time frame. http://www.ebay.com/itm/Lynskey-Ridgeline-29-Titanium-Mountain-Hardtail-Frame-Only-Size-Medium-37440-/152713642797?hash=item238e71432d:g:nBIAAOSwhxBZsrJL

http://www.ebay.com/itm/like/282595609715?chn=ps&dispItem=1

There is also Lynskey. http://www.ebay.com/itm/Lynskey-Pro-29-Ti-Frame-/263216137895?hash=item3d48e786a7:g:k0oAAOSwV4BZwHyr

http://www.ebay.com/itm/Lynskey-M290-Titanium-29er-MTB-Frame-Size-Large-Lynskey-Ridgeline-VF-/282619937498?hash=item41cd7602da:g:Q9oAAOSwaMpZm6D8

http://www.ebay.com/itm/Lynskey-Cove-Hummer-27-5-29-Titanium-MTB-Bike-Frame-Medium-Large-18-650BJ-29er-/322718773347?hash=item4b2389b063:g:T~YAAOSwWWxY-G2Z

or for a Chinese one ( I would buy a Chinese Titanium Frame any day over a Chinese Carbon Frame ) here is the Chinese one ...http://www.ebay.com/itm/like/282359311590?chn=ps&dispItem=1
 
actually the moot's ybb WAS considered in the past especially for it's rear suspension feature, how it was turned down because of the very same feature would flex the chainstay and may cause them to brake , infact i'm pretty sure it's in a post here somewhere ;) ..

the linskey seems nice however i don't think it would accept an alfine IGH (which has 135x10 axle, which is what i also want)


and i would be very very worried to purchase a chinese frame, wouldn't you be?
 
It depends on the frame. Titanium is perfectly acceptable but all frames made of it may not be. You need a strong one.
 
That's what I'm saying

At least brand names i can google reviews, report or opinions ..
http://forums.mtbr.com/29er-bikes/carver-ti-99er-ride-report-pics-387015.html
 
Yep. Many Ti frames are made too light, road frames especially. Good FS Ti frames are non existant. Best I have seen are MTB and Cargo category. A guy does make custom frames with Ti here, but very expansive and heavier than Alu. For that reason, I prefer Alu frames and building them with some of the good Ti components and hardware that I can find. My street commuter has many Ti parts: Handlebar and DM stem, shock and spring, chain, and lots of the screws. This is saving little weight for the high cost, but stays mint very long.
I just ordered extended Ti bolt-on pinch dropouts for my next build, that is saving a fair amount of weight but not something I could have done fine by myself with hand tools.
 
emaayan said:
and i would be very very worried to purchase a chinese frame, wouldn't you be?

Do you understand that almost all commercial frames, from any manufacturer, made of any material, are from China? Are you very very worried about that?

Mark Hickey, who was a longtime participant on rec.bicycles.tech, manufactures titanium frames with custom geometry at very reasonable prices. He makes that possible by using Chinese aerospace industry fabricators to do the work.
 
Chalo said:
emaayan said:
and i would be very very worried to purchase a chinese frame, wouldn't you be?

Do you understand that almost all commercial frames, from any manufacturer, made of any material, are from China? Are you very very worried about that?

Mark Hickey, who was a longtime participant on rec.bicycles.tech, manufactures titanium frames with custom geometry at very reasonable prices. He makes that possible by using Chinese aerospace industry fabricators to do the work.


Sure i do, Chinese folks also have thermonuclear weapons and those don't fall apart either: ) , there's Chinese, and there's no name Chinese with no qa or name to stand on, thats what i mean..
 
Hi,

I have one of these frames and it seems really strong and well built. It weighs about the same as my Reynolds 853 XC machine but rides really well. Only problem it has a press fit bottom bracket.
https://www.jguillem.com/
 
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