NewTro Lace

Purple / Black

(4 customer reviews)


The Newtro Lace is built on a high-performance last with an aggressive toe designed for caves and steeply overhanging routes.

A lower-volume heel with its own midsole has been introduced for improved fit, allowing for heel hooks that stick like duct tape. The closure utilizes a precision lacing system for added support and customizable fit.

The synthetic upper boasts a robust yet supple lining for added longevity and long-term support. To round out the model we added our high-friction RA rubber outsole, coupled with a durable performance UP Rand rubber.

International Sizing: SEE CHART



  • 3.5 mm RA rubber
  • Midsole stiffness: Harder
  • Line synthetic upper


  • Approx. weight: 428 g (per pair)
  • Size: US 4-14 / EU 35.5-48.5
  • Fit: Aggressive downturn


  • Upper: SOLO Suede
  • Insole: SOLO Suede
  • Tongue:  Suede + Tricoat


  • Precision lacing system


SHORE A80-84

Additional information

Weight 15.2 oz
Dimensions 12.5 × 5.8 × 3.7 in
US size

4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14


Men's, Women's

shoe type


Rubber Click here to learn more about UP rubber
International Sizing Click here to compare shoe sizes by international market

4 reviews for NewTro Lace

  1. Aaron Hjelt (verified owner)

    After two month of using these in El Salto and the surrounding limestone crags of Northern Mexico, I can say, without a doubt, these are my favorite sport lace-ups. Ever. Despite having Sirius LVs along, as well as some old Dragons, and Quantums (purples and blues) I laced these up for nearly every route I got on. If you’ve been to El Salto lately, you know how polished it’s become. The rubber and precision fit of these is unbelievable. UP improved on the old Purps with a construction that holds up pitch after pitch. This fit also eliminates some of the sloppy dead space. The lacing system is a great improvement: kind of a Miura-type feel. It’s solid and doesn’t need to be cranked on.
    The 3.5 RA rubber is super sticky and easy to engage. I did wear my toes out, but I’ve also been putting up new routes – this is to be expected. I’m planning on getting them resoled with a thicker and harder rubber, and have a fresh pair on standby with the RA.
    As for sizing, I stuck with my old Purple Quantum sizing and this worked great. When comparing the two, the old Purps were visually a half size smaller, but with the NewTros, I didn’t think they felt looser. There’s more structure to them, so they fit better. I wouldn’t size down. For reference, I’m a 7.5 in the Vims and 9.0 in the Sirius LV and Regulus LV.
    This is another amazing shoe from the UP crew.

  2. Carly (verified owner)

    Purple quantums had been my favorite shoe for years.
    When mine finally kicked it I bought these. Very similar feel to the purple quantums.
    Fit my foot like a glove. Heel doesn’t fall out.
    Bought a 7.5 in these (the same size as my quantums), the neutrolaces feel slightly bigger, maybe half size.

    Highly recommend.

  3. AB (verified owner)

    I wear a Muira lace (EU 38.5) and an Instinct VS WM (EU 39)– and this shoe has my favorite heel. The Newtro is sticky and edges well. I’ve loved bouldering it in it and when it comes to vertical pocketed climbing it slaps.

  4. Marty (verified owner)

    I really like these shoes and the rubber is no joke. I ordered on the low end of my street shoe size as recommended but the shoes are actually quite big, I could have probably downsized 1 full size because I have a lot of room in the heel and some in the toe. I have a wide forefoot and very low volume heel so even though the toe is doable, I find myself uncertain on hard heel hooks. But despite the sizing issue, I’m still climbing the hardest I’ve ever climbed and the shoes are performing great, just next time I’ll size down. The rubber is super grippy and gives me a lot of confidence.

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