Are these LEGO Technic wheels still in high demand?

Yes, as specific Technic parts from 2007, these 36-tooth wheels are valuable for completing older models.

How many pieces are included in this pack?

This listing includes a pack of 25 pieces for the LEGO 991328-1 set.

This specific part, 991328-1, is part of the LEGO Technic theme.

Name: LEGO 36-Tooth Double Conical Wheels (Pack of 25) (991328-1)
Brand: LEGO

Technic

Technic · 2007

Theme · TechnicPieces · 25Set Number · 991328-1Year · 2007

Used

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New / Sealed

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Live on eBay now

Converted from USD at the ECB reference rate — sold comps are US-market sales.

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Are these LEGO Technic wheels still in high demand?: Yes, as specific Technic parts from 2007, these 36-tooth wheels are valuable for completing older models.
How many pieces are included in this pack?: This listing includes a pack of 25 pieces for the LEGO 991328-1 set.
What theme does this part belong to?: This specific part, 991328-1, is part of the LEGO Technic theme.