---
title: "Technical FAQ: Mips vs. loose helmet strap, bike weight, hydraulic brakes at altitude, Di2 mix/match"
description: "Technical FAQ: Mips vs. loose helmet strap, bike weight, hydraulic brakes at altitude, Di2 mix/match"
---

[Zinn Cycles Blog | Bike Stories, Tech Tips & Featured Rides](https://blog.zinn.bike)

# [Technical FAQ: Mips vs. loose helmet strap, bike weight, hydraulic brakes at altitude, Di2 mix/match](https://blog.zinn.bike/technical-faq-mips-vs-loose-helmet-strap-bike-weight-hydraulic-brakes-at-altitude-di2-mix-match)

 Written by [Lennard Zinn](https://blog.zinn.bike/author/lennardzinn) | Nov 9, 2022, 3:00:18 AM

Helmet and bike safety are on readers' minds this week.

Read the full article at [Technical FAQ: Mips vs. loose helmet strap, bike weight, hydraulic brakes at altitude, Di2 mix/match](https://www.velonews.com/gear/tech-wearables/technical-faq-mips-vs-loose-helmet-strap-bike-weight-hydraulic-brakes-at-altitude-di2-mix-match/) on [VeloNews.com](https://www.velonews.com/).

[View full post](https://blog.zinn.bike/technical-faq-mips-vs-loose-helmet-strap-bike-weight-hydraulic-brakes-at-altitude-di2-mix-match)

```json
{
  "@context" : "http://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "Lennard Zinn"
  },
  "dateModified" : "2025-09-04T07:40:41.548Z",
  "datePublished" : "2022-11-09T03:00:18Z",
  "headline" : "Technical FAQ: Mips vs. loose helmet strap, bike weight, hydraulic brakes at altitude, Di2 mix/match",
  "image" : {
    "@type" : "ImageObject",
    "height" : 1350,
    "url" : "https://7255125.fs1.hubspotusercontent-na1.net/hubfs/7255125/Imported_Blog_Media/giro-eclipse-spherical-ex.jpg",
    "width" : 2400
  },
  "mainEntityOfPage" : "https://blog.zinn.bike/technical-faq-mips-vs-loose-helmet-strap-bike-weight-hydraulic-brakes-at-altitude-di2-mix-match",
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "height" : 60,
      "url" : "/hs/hsstatic/content_shared_assets/static-1.4092/img/default-amp-logo.png",
      "width" : 60
    },
    "name" : "Zinn Cycles Blog | Bike Stories, Tech Tips & Featured Rides"
  }
}
```