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Technical & Reference Section => Tech and Restoration => Topic started by: bmxbert on April 01, 2009, 10:59 PM
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does anybody think that there is a great difference in the way the ti axle and flush bolts on a profile crank are compared to a hollow cromo axle?
is the weight loss that big its worth all that cash???
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ride in 3/4's rather than jeans and keep your £50+ in your pocket youll save more weight and cash lol.
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thats what i thought. lol
what about the hollow cromo axles are they any good? i know there a lot cheaper
anybody had probs with them snaping ?
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Ive run hollow cromo's on every cranks ive had with no problems but have just changed to a Ti one as i got one for a tenner. I cant tell the differance ???
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thanks for the info buzz
hollow it is then. think i'll get ti bolts just for the fact they stay looking nice. :daumenhoch:
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WHS^^^
Dont bother Bert, the weight differance aint worth it
You could save more weight changing to lightweight tyres, rotating mass and all that, you'd feel the differance, ti axle in yer cranks would save a few ounces but doubt you'd be able to notice it when riding
That my 2 bobs worth... :daumenhoch:
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GT 4130 Profiles & Accessories (Weight Comparison)
(http://www.ossbmxracing.co.uk/Storage/GT4130ProfileParts1.jpg)
(http://www.ossbmxracing.co.uk/Storage/GT4130ProfileParts2.jpg)
(http://www.ossbmxracing.co.uk/Storage/GT4130ProfilePartsWeights.jpg)
| Part | Length | Material | Weight |
| Drive Arm | 180mm | Cro-Moly | 297g |
| Non-Drive Arm | 180mm | Cro-Moly | 289g |
| Drive Arm | 175mm | Cro-Moly | 290g |
| Non-Drive Arm | 175mm | Cro-Moly | 283g |
| 19mm 48 Spline Spindle | 146mm | Cro-Moly | 286g |
| 19mm 48 Spline Spindle | 146mm | Titanium | 163g |
| 19mm 48 Spline Spindle | 140mm | Titanium | 133g |
| Sealed Bearing & Cup | - | - | 97g |
| Hop-up Kit (Drive) | - | Aluminium | 8g |
| Hop-up Kit (Non-Drive) | - | Aluminium | 14g |
| Crank Arm Bolt | 25.0mm | ? | 22g |
| Crank Arm Bolt (Long) | 37.6mm | ? | 16g |
| Crank Arm Bolt Washer | ? | ? | 4g |
| Crank Arm Flush Bolt | 25.0mm | ? | 16g |
| Crank Arm Flush Bolt | 25.4mm | Titanium | 9g |
| Crank Arm Flush Washer | ? | Aluminium | 2g |
| Spindle BB Cup Spacer | 52.0mm | ? | 33g |
| Chainwheel Bolt | 18.0mm | ? | 11g |
| Chainwheel Bolt | 18.0mm | Titanium | 6g |
If I use the shortest Ti Spindle, Ti Flush Crank bolts and Ti Chainwheel Bolts, Flush kit, Hop Up kit and 180mm Arms it weighs 997g
If I use the Normal Spindle, Flush Crank bolts and Chainwheel Bolts, Flush kit, Hop Up kit and 180mm Arms it weighs 1175g
Ti versus Cro-Moly saves nearly 180g for this Crank Set (excludes Chainwheel and additional Aluminium washers and pedals)
This Ti Setup is 15.2% lighter!!
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wow ur a busy boy! cheers for the info
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I just found the original Thread that I posted this info on last October!!
I've copied over the rest of the info so you now have all the parts/weights listed as well as the pictures!! :daumenhoch:
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You could take a crap before you ride and save more weight without the expense :LolLolLolLol:
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You could take a crap before you ride and save more weight without the expense :LolLolLolLol:
Now thats true... :LolLolLolLol:
Take yer phone and change out yer pockets n all, oh and eat less pies... :D
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Yep!!
The Ti Axle is lighter but it wont affect the rotational mass much!!
Lighter Tires, inner tubes, wheels will get you the most gain!!
Plus shifting a few pound of lard from ya ass will help too!! :LolLolLolLol: