Hi, there

When i was assembling a set, i got a question.

I'm asking help to solve my curiosity, 

 

1. This product, 57518(Technic, Link Tread Wide with Two Pin Holes) is hard,  didn't bend  easily even if i give it strength, and i found it, made of ABS material.

 

 

2. And next part 3873(Technic, Link Tread) is softer and and was bent easily compared to 57518 when i give a strength

 

3. BrickMania Track Links

just added because look same material as No.2, Part 3873

 

I wonder why Lego made first one hard and second part light and soft

is there any difference in purpose or usage between the two parts?

 

and more, wanna know the raw material of 3873 briefly

 

Need Help you Guys

 

Thank you and have a nice day~

 

I think both is same abs. But in my opinion, 3873 is much weaker because smaller and less reinforced

16 hours ago, msk6003 said:

I think both is same abs. But in my opinion, 3873 is much weaker because smaller and less reinforced

then you mean the difference of ratio in material? i don't think that just small and less reinforced is the answer of it

thank you

I definitely know what you're on about. I found the same phenomenon in Bionicle G1 - some of the parts were made of a harder plastic, like the ball pegs and sockets, whereas armour, feet and weapons were much softer. The same applied in G2, although to different parts.

The small tread links are definitely made of a softer plastic

Edited September 24, 20195 yr by Bartybum

The smaller links are made of softer plastic indeed...probably to make it easier to clip the links together.