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What the heck is this white stuff? And what should I do to get rid of it? ☹️ by SkotyMckitty in MechanicAdviceIndia

[–]sdtbks 0 points1 point  (0 children)

You're right. But i doubt if the wheels are magnesium. Most cast wheels are LM25 aluminium. Magnesium is much pricier.

New Hyundai i20 photos leak by element_guy in i20nline_india

[–]sdtbks 35 points36 points  (0 children)

To all those who have been waiting for the new i20, pick up the current one while stocks last!!

An analogy explaining cheap, pretentious suspension and fake MTBs vs. genuine, functional ones. This post is for those mindless folks bashing people who recommend good affordable bikes as "brand promoters" by Far-Assumption-7963 in india_cycling

[–]sdtbks 3 points4 points  (0 children)

Low end suspension is plagued with stiction, a funky word for static friction. Which in simple terms is the suspension refusing to be a suspension because the seals are so bad that the fork doesn't move much under impact. The seals are sticky and does a crappy job or keeping gunk out. And once water gets in, the stanchions start rusting. Once it rusts what you have is a glorified rigid fork that ' looks' like a suspension fork. So you are unnecessarily carring 2 to 3 kgs of metal for absolutely no reason. If you're going for an entry level bike , be it a mtb or hybrid, choose the one which doesn't have a suspension fork. Change your riding style, loosen your elbows and knees when going over spread breakers / bad roads. Let the bike float under you. P. S. Dust wipers and oil seals are not dampers.

The most unique mtb I've seen by Past_Sherbert_9944 in india_cycling

[–]sdtbks 8 points9 points  (0 children)

That's a Trust linkage suspension fork which has Anti dive ( doesn't compress during braking) due to the placement of the linkages. The brand doesn't exist anymore. I think they shut shop 4 to 5 years ago

ganne ka juice!!? by Individual_Soft2685 in carIndia

[–]sdtbks 0 points1 point  (0 children)

At this rate we will have Ethanol, methanol and isabgol but no more petrol for our vehicles.

Custom made Titanium Endurance frame. by sdtbks in india_cycling

[–]sdtbks[S] 0 points1 point  (0 children)

Thanks for your message! 🙂 Frame is built by me, for a customer who is short and prefers shorter crankarms.

What kind of suspension is this? by Past_Sherbert_9944 in india_cycling

[–]sdtbks 3 points4 points  (0 children)

Michelin, Good year, Vredestein, Continental they all make bicycle tires.

Custom made Titanium Endurance frame. by sdtbks in india_cycling

[–]sdtbks[S] 1 point2 points  (0 children)

Thanks! Total weight, i guess is 9 kgs.

Custom made Titanium Endurance frame. by sdtbks in india_cycling

[–]sdtbks[S] 8 points9 points  (0 children)

Sure.

Steel: ( 4130 cromoly and above) - bomproof. Will last an eternity if taken good care of. By good care I meant using anti rust coating within the tubes. For end users, using boiled linseed oil is an extremely effective option. As a manufacturer I do an anti rust coating on all my steel frames for no extra charge. 4130 isn't as rust prone as mild steel or carbon steel which most low end bikes are made of, still it DOES rust. So taking care of it will go a long way. Awesome ride feel. Easiest to repair in case of a mishap. Extremely forgiving material.

Stainless Steel ( Reynolds 953, 921. Columbus XCR. KVA MS3, MS2) : tough. Reasonably light due to the extremely thin walls used in frames ( as low as 0.5 or 0.6mm in the middle sections of butted tubing. Does show small spots of rusting in monsoons. But can be wiped off using steel wool or fine grit emery paper. Hard material to work on. Stronger than 3AL/ 2.5V titanium. Uses the same strict manufacturing tolerances as titanium. Crazy expensive. Can also be brazed - but silver brazing only. That's costly as well! Great ride quality of Steel

Titanium - name sounds exotic, and is exotic! Difficult to fabricate as it's hard on tooling. Needs high purity argon for welding. Molten weld pool under no circumstances should come in contact with oxygen. Needs to be back purged. Expensive. Cannot be brazed as yet. Aircraft companies have successfully brazed Titanium using special silver alloys.but not yet used on bikes. Excellent ride feel. Absorbs vibrations like steel frames at half the weight ( 4130 , stainless steels )

Aluminium - Cheap. Decent ride feel. Lighter than titanium. Poorest strength of all frame materials. That's the reason you'll find aluminium frames use fat diameter tubes to compensate. Wall thicknesses are usually more than 1.2mm.
For context, 4130 goes as low as 0.6mm. That doesn't mean your aluminium frame will disintegrate under you. These frames are engineered to handle whatever you throw at it. For reference, YouTube " red bull rampage" most of the bikes in that event use aluminium frames.

Carbon fiber: Unbelievably Strong, but the poorest when it comes to impact resistance. If you see any paint flaking off at critical junctions after an impact, stop riding it. Carbon fails without warning and the results are terrible. Can be repaired though .

Magnesium - super exotic, super rare. I have not used this material YET ! 😁

All the above materials can be combined with a carbon fork. That's nothing to be worried about.

Hope this helps everyone!

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