diff --git a/lib-bms-protocol/src/types.rs b/lib-bms-protocol/src/types.rs
index 7b5996c..31ee68e 100644
--- a/lib-bms-protocol/src/types.rs
+++ b/lib-bms-protocol/src/types.rs
@@ -130,6 +130,14 @@ impl TryFrom<u32> for Stored_U26 {
 /// | 26 bits u26 value | 6 bits crc value |
 pub struct Transit_U26(u32);
 
+impl Transit_U26 {
+    pub fn new(value: u32) -> Self {
+        assert!(value <= U26_MAX_VALUE);
+        let crc6 = calc_crc6(value);
+        Self((value << 6) | (crc6 & 0x3F) as u32)
+    }
+}
+
 impl From<Transit_U26> for u32 {
     fn from(value: Transit_U26) -> Self {
         value.0 & U26_VALUE_MASK >> 6
@@ -143,7 +151,7 @@ impl TryFrom<u32> for Transit_U26 {
         if value > U26_MAX_VALUE {
             Err(U26Error::Overflow)
         } else {
-            todo!()
+            Ok(Transit_U26::new(value))
         }
     }
 }
@@ -324,7 +332,6 @@ pub fn check_hemming(data: u32, hemming: u8) -> Result<(), HemmingCorrectionValu
 /// - All single-bit errors
 /// - All double-bit errors
 /// - Random errors with a probability of 2^-6 = 0.015625 of going undetected
-#[cfg(test)]
 pub fn calc_crc6(data: u32) -> u8 {
     let mut working_data: u32 = data << 6;
     let mut polynom: u32 = 0x43 << 25;